Cinnamic acid amides

ABSTRACT

The present invention relates to compounds, to processes for preparing them, to pharmaceutical compositions comprising them, and to their use in the therapy and/or prophylaxis in illnesses in people or animals, especially diseases of bacterial infection.

The present invention relates to compounds, to processes for preparing them, to pharmaceutical compositions comprising them, and to their use in-the therapy and/or prophylaxis in illnesses in people or animals, especially diseases of bacterial infection.

The natural substances moiramide B (R^(a)=hydrogen, R^(b)=methyl) and andrimid (R^(a)=hydrogen, R^(b)=propenyl) have been described as having antibacterial activity, whereas moiramide C (R^(a)=hydroxyl, R^(b)=propenyl) is inactive. (A. Fredenhagen, S. Y. Tamura, P. T. M. Kenny, H. Komura, Y. Naya, K. Nakanishi, J. Am. Chem. Soc., 1987, 109, 4409-4411; J. Needham, M. T. Kelly, M. Ishige, R. J. Andersen, J. Org. Chem., 1994, 59, 2058-2063; M. P. Singh, M. J. Mroczenski-Wildey, D. A. Steinberg, R. J. Andersen, W. M. Maiese, M. Greenstein, J. Antibiot., 1997, 50(3), 270-273). The isolation and antibacterial activity of andrimid is also desccribed in EP-A-250 115. JP 01301657 describes the use of andrimid and certain amide-type derivatives as agrochemical antibiotics.

The synthesis of andrimid is described in A. V. Rama Rao, A. K. Singh, Ch. V. N. S. Varaprasad, Tetrahedron Letters, 1991, 32, 4393-4396, that of moiramide B and andrimid in S. G. Davies, D. J. Dixon, J. Chem. Soc., Perkin Trans. 1, 1998, 2635-2643.

The properties of the natural substances, such as their activity, for example, do not meet the requirements imposed on antibacterial medicinal products.

Although antibacterial products with different structures are on the market, a regular possibility is the development of resistance. New products for improved and effective therapy are therefore desirable.

It is an object of the present invention, therefore, to provide new and alternative compounds having equal or improved antibacterial action for treating bacterial diseases in people and animals.

Surprisingly it has been found that derivatives of this class of compound in which the beta-phenylalanine amide group is replaced by a vinylogous aromatic or heteroaromatic amide have antibacterial activity.

The present invention accordingly provides compounds of the formula

in which

-   R¹ is hydrogen, methyl or halogen, -   R¹′ is hydrogen, methyl or halogen, -   R² is hydrogen or methyl, -   R³ is hydrogen, hydroxyl, amino, C₁-C₃ alkyl, C₁-C₃ alkoxy,     benzyloxy, C₁-C₃ alkylamino, C₁-C₃ alkylcarbonylamino,     phenylcarbonylamino or benzyl-carbonylamino, -   R⁴ is hydrogen or C₁-C₃ alkyl, -   R⁵ is halogen, trifluoromethyl, trifluoromethoxy, nitro, amino,     alkylamino, hydroxyl, alkyl, alkoxy, carboxyl, alkoxycarbonyl,     benzyloxycarbonyl, aminocarbonyl, alkylaminocarbonyl, aryl or     heteroaryl, -   or -   two substituents R⁵ together with the carbon atoms to which they are     attached form a cycloalkyl or heterocyclyl each of which may be     substituted by 0, 1 or 2 substituents R⁵⁻¹, the substituents R⁵⁻¹     being selected independently of one another from the group     consisting of halogen, nitro, amino, trifluoromethyl, hydroxyl and     alkoxy, -   R⁶ is alkyl, cycloalkyl or cycloalkenyl, -   it being possible for R⁶ to be substituted by 0, 1, 2 or 3     substituents R⁶⁻¹, the substituents R⁶⁻¹ being selected     independently of one another from the group consisting of halogen,     nitro, amino, trifluoromethyl, hydroxyl, alkyl and alkoxy, -   n is a number 0, 1, 2 or 3, -   it being possible for the radicals R⁵ to be identical or different     when n is 2 or 3, -   m is a number 1, 2 or 3, -   A is aryl or heteroaryl, -   it being possible for A to be substituted by 0, 1, 2 or 3     substituents R^(A), the substituents R^(A) being selected     independently of one another from the group consisting of halogen,     alkyl, nitro, amino, cyano, trifluoromethyl, aryl, heteroaryl,     hydroxyl, alkoxy, alkylamino, carboxyl, alkoxycarbonyl,     aminocarbonyl, alkyl-carbonylamino and alkylaminocarbonyl, -   or -   two substituents R^(A) together with the carbon atoms to which they     are attached form a cycloalkyl or heterocyclyl each of which may be     substituted by 0, 1 or 2 substituents R^(A-1), the substituents     R^(A-1) being selected independently of one another from the group     consisting of halogen, nitro, amino, trifluoromethyl, hydroxyl and     alkoxy, -   B is aryl or heteroaryl.

The compounds of the invention may also be in the form of their salts, solvates or solvates of the salts.

Depending on their structure the compounds of the invention may exist in stereoisomeric forms (enantiomers, diastereomers). The invention therefore relates to the enantiomers or diastereomers and their respective mixtures. From such mixtures of enantiomers and/or diastereomers it is possible to isolate the stereoisomerically uniform constituents in a known way.

The invention relates also, depending on the structure of the compounds, to tautomers of the compounds.

Salts preferred in the context of the invention are physiologically acceptable salts of the compounds of the invention.

Physiologically acceptable salts of the compounds (I) embrace acid addition salts of mineral acids, carboxylic acids and sulfonic acids, e.g., salts of hydrochloric acid, hydrobromic acid, sulfuric acid, phosphoric acid, methanesulfonic acid, ethanesulfonic acid, toluenesulfonic acid, benzenesulfonic acid, naphthalenedisulfonic acid, acetic acid, propionic acid, lactic acid, tartaric acid, malic acid, citric acid, fumaric acid, maleic acid and benzoic acid.

Physiologically acceptable salts of the compounds (I) also embrace salts of customary bases, such as, by way of example and preferably, alkali metal salts (e.g., sodium and potassium salts), alkaline earth metal salts (e.g. calcium and magnesium salts) and ammonium salts derived from ammonia or organic amines having 1 to 16 carbon atoms, such as, by way of example and preferably, ethylamine, diethylamine, triethylamine, ethyldiisopropylamine, monoethanolamine, diethanolamine, triethanolamine, dicyclo-hexylamine, dimethylaminoethanol, procaine, dibenzylamine, n-methylmorpholine, dihydroabietylamine, arginine, lysine, ethylenediamine and methylpiperidin.

Solvates in the context of the invention are those forms of the compounds which in the solid or liquid state form a complex by coordination with solvent molecules. Hydrates are one specific form of the solvates, in which the coordination is with water.

In the context of the present invention the signification of the substituents, unless specified otherwise, is as follows

Alkyl per se and “alk” and “alkyl” in alkoxy, alklamino, alkylaminocarbonyl, alkylcarbonylamino and alkoxycarbonyl are a linear or branched alkyl radical having generally 1 to 6, preferably 1 to 4, more preferably 1 to 3 carbon atoms, by way of example and preferably methyl, ethyl, n-propyl, isopropyl, tert-butyl, n-pentyl and n-hexyl.

Alkoxy is by of example and preferably methoxy, ethoxy, n-propoxy, isopropoxy, tert-butoxy, n-pentoxy and n-hexoxy.

Alkylamino is an alkylamino radical having one or two alkyl substituents (chosen independently of one another), by way of example and preferably methylamino, ethylamino, n-propylamino, isopropylamino, tert-butylamino, n-pentylamino, n-hexylamino, N,N-dimethylamino, N,N-diethylamino, N-ethyl-N-methylamino, N-methyl-N-n-propylamino, N-isopropyl-N-n-propylamino, N-t-butyl-N-methylamino, N-ethyl-N-n-pentylamino and N-n-Hexyl-N-methylamino.

Alkylaminocarbonyl is an alkylaminocarbonyl radical having one or two alkyl substituents (chosen independently of one another), by way of example and preferably methylaminocarbonyl, ethylaminocarbonyl, n-propylaminocarbonyl, isopropylamino-carbonyl, tert-butylaminocarbonyl, n-pentylaminocarbonyl, n-hexylaminocarbonyl, N,N-dimethylaminocarbonyl, N,N-diethylaminocarbonyl, N-ethyl-N-methylamino-carbonyl, N-methyl-N-n-propylaminocarbonyl, N-isopropyl-N-n-propylaminocarbonyl, N-t-butyl-N-methylaminocarbonyl, N-ethyl-N-n-pentylaminocarbonyl and N-n-hexyl-N-methylaminocarbonyl.

Alkylcarbonylamino is by way of example and preferably methylcarbonylamino, ethylcarbonylamino, n-propylcarbonylamino, isopropylcarbonylamino, tert-butyl-carbonylamino, n-pentylcarbonylamino and n-hexylcarbonylamino.

Alkoxycarbonyl is by way of example and preferably methoxycarbonyl, ethoxy-carbonyl, n-propoxycarbonyl, isopropoxycarbonyl, tert-butoxycarbonyl, n-pentoxycarbonyl and n-hexoxycarbonyl.

Cycloalkyl is a cycloalkyl group having generally 3 to 8, preferably 5 to 7 carbon atoms; specified by way of example and preferably for cycloalkyl are cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl.

Cycloalkenyl is a cycloalkyl group having generally 3 to 8, preferably 5 to 7 carbon atoms; specified by way of example and preferably for cycloalkenyl are cyclopropenyl, cyclobutenyl, cyclopentenyl, cyclohexenyl and cycloheptenyl.

Aryl is a mono- to tricyclic aromatic radical having generally 6 to 14 carbon atoms; specified by way of example and preferably for aryl are phenyl, naphthyl and phenanthrenyl.

Heteroaryl is an aromatic, mono- or bicyclic radical having generally 5 to 10, preferably 5 to 6 ring atoms and up to 5, preferably up to 4, heteroatoms from the series S, O and N; by way of example and preferably thienyl, furyl, pyrrolyl, thiazolyl, oxazolyl, imidazolyl, pyridyl, pyrimidyl, pyridazinyl, indolyl, indazolyl, benzofuranyl, benzothiophenyl, quinolinyl, isoquinolinyl.

Heterocyclyl is a mono- or polycyclic, preferably mono- or bicyclic, heterocyclic radical having generally 4 to 10, preferably 5 to 8 ring atoms and up to 3, preferably up to 2, heteroatoms and/or hetero-groups from the series N, O, S, SO, SO₂. The heterocyclyl radicals may be saturated or partly unsaturated. Preference is given to 5- to 8-membered, monocyclic saturated heterocyclyl radicals having up to two heteroatoms from the series O, N and S, such as, by way of example and preferably, tetrahydrofuran-2-yl, pyrrolidin-2-yl, pyrrolidin-3-yl, pyrrolinyl, piperidinyl, morpholinyl, perhydroazepinyl.

Halogen is fluorine, chlorine, bromine and iodine, preferably fluorine and chlorine.

If radicals in the compounds of the invention are substituted the radicals, unless specified otherwise, may be substituted by one or more identical or different substituents. Substitution by up to three identical or different substituents is preferred. Very particular preference is given to substitution by one substituent.

Preference is given in the context of the present invention to compounds of the formula (I)

in which

-   R¹ is hydrogen or methyl, -   R¹′ is hydrogen, methyl or fluorine, -   R² is hydrogen, -   R³ is hydrogen, amino, C₁-C₃ alkyl, C₁-C₃ alkoxy, benzyloxy, C₁-C₃     alkylamino, C₁-C₃ alkylcarbonylamino, phenylcarbonylamino or     benzyl-carbonylamino, -   R⁴ is methyl, -   R⁵ is fluorine, chlorine, trifluoromethyl, trifluoromethoxy, nitro,     amino, alkylamino, hydroxyl, alkyl, alkoxy, alkoxycarbonyl,     aminocarbonyl, phenyl or 5- to 6-membered heteroaryl, -   or -   two substituents R⁵ together with the carbon atoms to which they are     attached form a 5- to 6-membered cycloalkyl or 5- to 6-membered     heterocyclyl, -   R⁶ is C₂-C₇ alkyl, C₃-C₇ cycloalkyl or C₅-C₇ cycloalkenyl, -   it being possible for R⁶ to be substituted by 0, 1 or 2 substituent     R⁶⁻¹, R⁶⁻¹ being selected from the group consisting of halogen,     trifluoromethyl, alkyl and methoxy, -   n is a number 0, 1 or 2, -   it being possible for the radicals R⁵ to be identical or different     if n is 2, -   m is a number 1 or 2, -   A is phenyl, naphthyl or 5-, 6- or 10-membered heteroaryl, -   it being possible for A to be substituted by 0, 1 or 2 substituents.     R^(A), the substituents R^(A) being selected independently of one     another from the group consisting of halogen, alkyl, amino, cyano,     trifluoromethyl, aryl, heteroaryl, hydroxyl, alkoxy, alkylamino,     alkoxycarbonyl and aminocarbonyl, -   or -   two substituents R^(A) together with the carbon atoms to which they     are attached form a 5- to 6-membered cycloalkyl or 5- to 6-membered     heterocyclyl each of which may be substituted by 0 or 1 substituents     R^(A-1), the substituents R^(A-1) being selected independently of     one another from the group consisting of halogen, nitro, amino,     trifluoromethyl, hydroxyl and alkoxy, -   B is phenyl, naphthyl or 5-, 6-, 9- or 10-membered heteroaryl.

Preference in the context of the present invention is also given to compounds of the formula (I) which conform to the formula (Ia)

in which

-   R¹ is hydrogen, -   R¹′ is hydrogen, methyl or fluorine, -   R² is hydrogen, -   R³ is hydrogen, amino, methyl, methoxy, ethoxy, methylamino or     dimethylamino, -   R⁴ is methyl, -   R⁵ is fluorine, chlorine, trifluoromethyl, alkoxy, methoxycarbonyl,     C₁-C₄ alkyl, phenyl or pyridyl, -   or -   two substituents R⁵ together with the carbon atoms to which they are     attached form a 5- or 6-membered heterocyclyl, -   R⁶ is C₃-C₆ alkyl, C₄-C₆ cycloalkyl or C₅-C₆ cycloalkenyl, -   n is a number 0, 1 or 2, -   it being possible for the radicals R⁵ to be identical or different     if n is 2, -   m is the number 1, -   A is phenyl, pyridyl, imidazolyl, thienyl, furanyl, oxadiazolyl,     pyrazolyl, pyrazinyl, pyridazinyl, pyrimidinyl, quinolinyl or     isoquinolinyl, -   it being possible for A to be substituted by 0, 1 or 2 substituents     R^(A), the substituents R^(A) being selected independently of one     another from the group consisting of halogen, alkyl, cyano,     trifluoromethyl, phenyl and alkoxy, -   or -   two substituents R^(A) together with the carbon atoms to which they     are attached form a 5- or 6-membered heterocyclyl, -   B is phenyl, naphthyl, pyridyl, thienyl, furanyl, quinolinyl or     isoquinolinyl.

Preference in the context of the present invention is also given to compounds of the formula (Ia),

-   in which -   R¹ is hydrogen, -   R¹′ is hydrogen, -   R² is hydrogen, -   R³ is hydrogen, amino, methylamino or dimethylamino, -   R⁴ is methyl, -   R⁵ is fluorine, chlorine, trifluoromethyl, methoxy, C₁-C₄ alkyl,     phenyl or pyridyl, -   or -   two substituents R⁵ together with the phenyl ring to which they are     attached form a 1,3-benzodioxole or a 1,4-benzodioxane, -   R⁶ is isopropyl, tert-butyl, isobutyl, isopentyl, cyclobutyl or     cyclopentyl, -   n is a number 0, 1 or 2, -   it being possible for the radicals R⁵ to be identical or different     if n is 2, -   m is the number 1, -   A is phenyl, pyridyl, thienyl, quinolinyl or isoquinolinyl, -   it being possible for A to be substituted by 0, 1 or 2 substituents     R^(A), the substituents R^(A) being selected independently of one     another from the group consisting of fluorine, chlorine, C₁-C₃     alkyl, cyano, trifluoromethyl, phenyl and C₁-C₃ alkoxy, -   or -   two substituents R^(A) together with the phenyl ring to which they     are attached form a 1,3-benzodioxole or a 1,4-benzodioxane, -   B is phenyl, naphthyl, thienyl, quinolinyl or isoquinolinyl.

Preference in the context of the present invention is also given to compounds of formula (I) in which R¹ to R⁶, A, B, m and n are as defined above and R⁴ is other than hydrogen.

Preference in the context of the present invention is also given to the compounds of the formula (I) in which R¹ is hydrogen.

Preference in the context of the present invention is also given to the compounds of the formula (I) or (Ia) in which R¹′ is hydrogen.

Preference in the context of the present invention is also given to the compounds of the formula (I) in which R² is hydrogen.

Preference in the context of the present invention is also given to the compounds of the formula (I) or (Ia) in which R³ is hydrogen or amino.

Preference in the context of the present invention is also given to the compounds of the formula (I) in which R⁴ is methyl.

Preference in the context of the present invention is also given to the compounds of the formula (I) or (Ia) in which n is the number zero.

Preference in the context of the present invention is also given to the compounds of the formula (I) in which n is the number 1, B is phenyl and R⁵ is fluorine, chlorine, trifluoromethyl, alkoxy, C₁-C₄ alkyl, phenyl or pyridyl, R⁵ being positioned meta or para to the linkage site of the phenyl ring. By the linkage site of the phenyl ring is meant the carbon atom of the phenyl ring carrying R⁵ to which the phenyl ring carrying R⁵, in accordance with formula (I) or (Ia) as B, is attached to the remainder of the compound.

Preference in the context of the present invention is also given to the compounds of the formula (I) or (Ia), in which R⁶ is isopropyl, tert-butyl, isobutyl, isopentyl or cyclopentyl.

Preference in the context of the present invention is also given to the compounds of the formula (I), in which m is the number 1.

Preference in the context of the present invention is also given to the compounds of the formula (I) or (Ia) in which

-   A is phenyl or pyridyl, -   it being possible for A to be substituted by 0, 1 or 2 substituents     R^(A), the substituents R^(A) being selected independently of one     another from the group consisting of fluorine, chlorine, cyano,     trifluoromethyl, phenyl and methoxy.

Preference in the context of the present invention is also given to the compounds of the formula (I) or (Ia) in which B is phenyl.

Preference in the context of the present invention is also given to the following compounds:

-   (2E)-3-(1,3-benzodioxol-5-yl)-N-{(1S)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxo-1-phenylpropyl}-2-propenamide, -   (2E)-3-(1,3-benzodioxol-5-yl)-N-{(1S)-3-[((1S)-2,2-dimethyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxo-1-phenylpropyl}-2-propenamide, -   (2E)-3-(1,3-benzodioxol-5-yl)-N-{1-(2,3-dihydro-1,4-benzodioxin-6-yl)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]-3-carbonyl}propyl)amino]-3-oxopropyl}-2-propenamide, -   (2E)-N-{1-(2,3-dihydro-1,4-benzodioxin-6-yl)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxopropyl}-3-phenyl-2-propenamide, -   (2E)-N-{(1S)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]-carbonyl}propyl)amino]-3-oxo-1-phenylpropyl}-3-(4-methylphenyl)-2-propenamide, -   (2E)-3-(2H-benzo[d]1,3-dioxolan-5-yl)-N-((1S)-2-{N-[(1S)-2-((4S,3R)-4-methyl-2,5-dioxoazolidin-3-yl)-1-cyclopentyl-2-oxoethyl]carbamoyl}-1-phenylethyl)prop-2-enamide, -   (2E)-N-((1S)-2-{N-[(1S)-2-((4S,3R)-4-methyl-2,5-dioxoazolidin-3-yl)-1-cyclopentyl-2-oxoethyl]carbamoyl}-1-phenylethyl)-3-(4-cyanophenyl)prop-2-enamide, -   (2E)-N-((1S)-2-{N-[(1S)-2-((4S,3R)-1-amino-4-methyl-2,5-dioxoazolidin-3-yl)-1-cyclopentyl-2-oxoethyl]carbamoyl}-1-phenylethyl)-3-(4-cyanophenyl)prop-2-enamide, -   (2E)-N-(2-{N-[(1S)-2-((4S,3R)-1-amino-4-methyl-2,5-dioxoazolidin-3-yl)-1-cyclo-pentyl-2-oxoethyl]carbamoyl}-1-(2-naphthyl)ethyl)-3-(4-cyanophenyl)prop-2-enamide, -   (2E)-N-[(1S)-2-(N-{((1S)-2-[(4S,3R)-1-(dimethylamino)-4-methyl-2,5-dioxoazolidin-3-yl]-1-cyclopentyl-2-oxoethyl}carbamoyl)-1-phenylethyl]-3-(4-cyanophenyl)prop-2-enamide.

The invention further provides processes for preparing compounds of the formula (I), where

-   by process [A] -   compounds of the formula

in which R² to R⁶, B and n are as defined above, are reacted with compounds of the formula

in which R¹ and R¹′, A and m are as defined above, it being possible for these to be in activated form if desired,

-   or -   by process [B] -   compounds of the formula

in which R³, R⁴ and R⁶ are as defined above, are reacted with compounds of the formula

in which R¹, R¹′, R², R⁵, A, B, m and n are as defined above, it being possible for these to be in activated form if desired.

Suitable for converting the compounds into the activated form in the abovementioned processes are, for example, carbodiimides such as N,N′-diethyl-, N,N,′-dipropyl-, N,N′-diisopropyl-, N,N′-dicyclohexylcarbodiimide, N-(3-dimethylaminoisopropyl)-N′-ethylcarbodiimide hydrochloride (EDC) (optionally in the presence of pentafluorophenol (PFP)), N-cyclohexylcarbodiimide-N′-propyloxymethyl-polystyrene (PS-carbodiimide) or carbonyl compounds such as carbonyldiimidazole, or 1,2-oxazolium compounds such as 2-ethyl-5-phenyl-1,2-oxazolium-3-sulfate or 2-tert-butyl-5-methyl-isoxazolium perchlorate, or acylamino compounds such as 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline, or propanephosphonic anhydride, or isobutyl chloroformate, or bis(2-oxo-3-oxazolidinyl)phosphoryl chloride or benzotriazolyloxytri(dimethylamino)phosphonium hexafluorophosphate, or O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU), 2-(2-oxo-1-(2H)-pyridyl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TPTU) or O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyl-uronium hexafluorophosphate (HATU), or 1-hydroxybenzotriazole (HOBt), or benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP), or mixtures of these with bases.

Bases are, for example, alkali metal carbonates, such as sodium or potassium carbonate, or hydrogencarbonate, or organic bases such as trialkylamines, e.g. triethylamine, N-methylmorpholine, N-methylpiperidine, 4-dimethylaaminopyridine or diisopropylethylamine.

Preference is given to using HATU and diisopropylethylamine or EDC with HOBt and triethylamine.

Suitable solvents in this context include inert organic solvents which do not change under the reaction conditions. These include halogenated hydrocarbons such as dichloromethane or trichloromethane, hydrocarbon such as benzene, xylene, toluene, hexane, cyclohexane, or petroleum fractions, nitromethane, dimethylformamide or acetonitrile or ethers such as diethyl ether, tetrahydrofuran or dioxane. It is also possible to use mixtures of the solvents. Particular preference is given to a mixture of dichloromethane and dimethylformamide.

Process [A]

The compounds of the formula (II) are known or can be prepared by admixing compounds of the formula

in which R² to R⁶, B and n are as defined above,

-   with acid, in particular with hydrochloric acid or trifluoroacetic     acid. The compounds of the formula (II) are in this case obtained in     the form of the corresponding salts, e.g. in the form of their     hydrochlorides, and can be used further in this form.

Suitable solvents in this context include inert organic solvents which do not change under the reaction conditions. These include halogenated hydrocarbons such as dichloromethane or trichloromethane, hydrocarbons such as benzene, xylene, toluene, hexane, cyclohexane, or petroleum fractions, nitromethane, dimethylformamide or acetonitrile or ethers such as diethyl ether, tetrahydrofuran or dioxane. It is also possible to use mixtures of the solvents. Particular preference is given to the use of hydrochloric acid in dioxane or trifluoroacetic acid in dichloromethane.

The compounds of the formula (VI) are known or can be prepared by reacting compounds of the formula (IV) with compounds of the formula

in which R², R⁵, B and n are as defined above, it being possible for these to be in activated form if desired.

Suitable for converting the compounds into the activated form are, for example, carbodiimides such as N,N′-diethyl-, N,N,′-dipropyl-, N,N′-diisopropyl-, N,N′-dicyclohexylcarbodiimide, N-(3-dimethylaminoisopropyl)-N′-ethylcarbodiimide hydrochloride (EDC) (optionally in the presence of pentafluorophenol (PFP)), N-cyclohexylcarbodiimide-N′-propyloxymethyl-polystyrene (PS-carbodiimide) or carbonyl compounds such as carbonyldiimidazole, or 1,2-oxazolium compounds such as 2-ethyl-5-phenyl-1,2-oxazolium-3-sulfate or 2-tert-butyl-5-methyl-isoxazolium perchlorate, or acylamino compounds such as 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline, or propanephosphonic anhydride, or isobutyl chloroformate, or bis(2-oxo-3-oxazolidinyl)phosphoryl chloride or benzotriazolyloxytri(dimethylamino)phosphonium hexafluorophosphate, or O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU), 2-(2-oxo-1-(2H)-pyridyl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TPTU) or O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyl-uronium hexafluorophosphate (HATU), or 1-hydroxybenzotriazole (HOBt), or benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP), or mixtures of these with bases.

Bases are, for example, alkali metal carbonates, such as sodium or potassium carbonate, or hydrogencarbonate, or organic bases such as trialkylamines, e.g. triethylamine, N-methylmorpholine, N-methylpiperidine, 4-dimethylaminopyridine or diisopropylethylamine.

Preference is given to using HATU and diisopropylethylamine or EDC with HOBt and triethylamine.

Suitable solvents in this context include inert organic solvents which do not change under the reaction conditions. These include halogenated hydrocarbons such as dichloromethane or trichloromethane, hydrocarbon such as benzene, xylene, toluene, hexane, cyclohexane, or petroleum fractions, nitromethane, dimethylformamide or acetonitrile or ethers such as diethyl ether, tetrahydrofuran or dioxane. It is also possible to use mixtures of the solvents. Particular preference is given to a mixture of dichloromethane and dimethylformamide.

The compounds of the formula (IV) are known from the literature or can be prepared by admixing compounds of the formula

in which R³, R⁴ and R⁶ are as defined above, with acid, in particular with hydrochloric acid or trifluoroacetic acid.

Suitable solvents in this context include inert organic solvents which do not change under the reaction conditions. These include halogenated hydrocarbons such as dichloromethane or trichloromethane, hydrocarbons such as benzene, xylene, toluene, hexane, cyclohexane, or petroleum fractions, nitromethane, dimethylformamide or acetonitrile or ethers such as diethyl ether, tetrahydrofuran or dioxane. It is also possible to use mixtures of the solvents. Particular preference is given to the use of hydrochloric acid in dioxane or trifluoroacetic acid in dichloromethane.

The compounds of the formula (VII) are known or can be prepared by procedures known from the literature. (With regard to the preparation of aromatic beta-amino acids see: S. Rault, P. Dallemagne, M. Robba, Bull. Soc. Chim. Fr., 1987, 1079-1083; S. G. Davies, et al., J. Chem. Soc., Chem. Commun. 1993, 14, 1153-1155; regarding the reaction to form the tert-butoxycarbonyl-protected compounds see T. W. Greene, P. G. M. Wuts, Protective Groups in Organic Synthesis, 3^(rd) Edt. 1999, J. Wiley & Sons, Inc.).

The compounds of the formula (VIII) are known or can be prepared by methods known from the literature. (Cf., e.g., S. G. Davies, D. J. Dixon, J. Chem. Soc., Perkin Trans. 1, 1998, 17, 2635-2643; A. V. Rama Rao, A. K. Singh, Ch. V. N. S. Varaprasad, Tetrahedron Letters, 1991, 32, 4393-4396).

The compounds of the formula (III) are known or can be prepared by methods known from the literature (Houben-Weyl, Methoden der organischen Chemie, vol. E5, carboxylic acids and carboxylic acid derivatives, Thieme Verlag, Stuttgart, 1985).

Process [B]

The compounds of the formula (V) are known from the literature or can be prepared by hydrolyzing compounds of the formula

in which R¹, R¹′, R², R⁵, A, B, m and n are as defined above and R⁷ is an alkyl radical.

The hydrolysis can be carried out in accordance with standard methods, e.g., in a mixture of ethanol and water with 40% strength sodium hydroxide solution at room temperature or in a mixture of dioxane and water with methanolic potassium hydroxide solution.

The compounds of the formula (IX) are known from the literature or can be prepared by reacting compounds of the formula

in which R², R⁵, R⁷, B and n are as defined above, with compounds of the formula (III), it being possible for these to be in activated form if desired.

Suitable for converting the compounds into the activated form in the abovementioned processes are, for example, carbodiimides such as N,N′-diethyl-, N,N,′-dipropyl-, N,N′-diisopropyl-, N,N′-dicyclohexylcarbodiimide, N-(3-dimethylaminoisopropyl)-N′-ethylcarbodiimide hydrochloride (EDC) (optionally in the presence of pentafluorophenol (PFP)), N-cyclohexylcarbodiimide-N′-propyloxymethyl-polystyrene (PS-carbodiimide) or carbonyl compounds such as carbonyldiimidazole, or 1,2-oxazolium compounds such as 2-ethyl-5-phenyl-1,2-oxazolium-3-sulfate or 2-tert-butyl-5-methyl-isoxazolium perchlorate, or acylamino compounds such as 2-ethoxy-1-ethoxycarbonyl-1,2-dihydroquinoline, or propanephosphonic anhydride, or isobutyl chloroformate, or bis(2-oxo-3-oxazolidinyl)phosphoryl chloride or benzotriazolyloxytri(dimethylamino)phosphonium hexafluorophosphate, or O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (HBTU), 2-(2-oxo-1-(2H)-pyridyl)-1,1,3,3-tetramethyluronium tetrafluoroborate (TPTU) or O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyl-uronium hexafluorophosphate (HATU), or 1-hydroxybenzotriazole (HOBt), or benzotriazol-1-yloxytris(dimethylamino)phosphonium hexafluorophosphate (BOP), or mixtures of these with bases.

Bases are, for example, alkali metal carbonates, such as sodium or potassium carbonate, or hydrogencarbonate, or organic bases such as trialkylamines, e.g. triethylamine, N-methylmorpholine, N-methylpiperidine, 4-dimethylaminopyridine or diisopropylethylamine.

Preference is given to using HATU and diisopropylethylamine or EDC with HOBt and triethylamine.

Suitable solvents in this context include inert organic solvents which do not change under the reaction conditions. These include halogenated hydrocarbons such as dichloromethane or trichloromethane, hydrocarbon such as benzene, xylene, toluene, hexane, cyclohexane, or petroleum fractions, nitromethane, dimethylformamide or acetonitrile or ethers such as diethyl ether, tetrahydrofuran or dioxane. It is also possible to use mixtures of the solvents. Particular preference is given to a mixture of dichloromethane and dimethylformamide.

The compounds of the formula (X) are known from the literature or can be prepared in analogy to methods known from the literature (e.g., S. G. Davies et. al., J. Chem. Soc. Chem. Comm., 1993, 14, 1153-1155; S. J. Faulconbridge et al., Tetrahedron Letters, 2000, 41, 2679-2682; M. J. Ashton et al., Heterocycles, 1989, 28, 1015-1035).

Synthesis may also take place on a polymeric support. In that case R² in the synthesis sequence is a polymer (Resin), preference being given to the use of 4-(4-formyl-3-methoxyphenoxy)butyryl-aminomethyl-polystyrene or another resin in which a polymeric backbone such as polystyrene or block copolymers of polystyrene with ethylene glycol has attached to it via a linker group such as 3-methoxyphenoxyethyl, 3,5-dimethoxyphenoxyethoxymethyl or 3-methoxyphenoxybutyrylaminomethyl a formyl radical or another radical which allows amines to be attached to the polymeric support.

The preparation of the compounds of the invention can be illustrated by the following synthesis schemes:

Starting Compounds

Preparation Examples

Solid-phase Synthesis

The present invention further provides compounds of the formula (I) for controlling diseases, particularly bacterial diseases, and also medicinal products comprising compounds of the formula (I) in combination with at least one pharmaceutically compatible, pharmaceutically acceptable carrier or other auxiliary, and also for the use of compounds of the formula (I) for producing a medicinal product for treating bacterial diseases.

The formulations of the invention are particularly active against bacteria and bacterialike microorganisms. They are therefore particularly suitable for the prophylaxis and chemotherapy of local and systemic infections in human and veterinary medicine that are induced by these pathogens.

By way of example it is possible to treat and/or prevent local and/or systemic diseases caused by the following pathogens or by combinations of the following pathogens:

Gram-positive cocci, e.g., staphylococci (Staph. aureus, Staph. epidermidis), enterococci (E. faecalis, E. faecius) and streptococci (Strept. agalactiae, Strept. pneumoniae); gram-negative cocci (Neisseria gonorrhoeae) and gram-negative rods such as enterobacteria, e.g., Escherichia coli, hemophilus influenzae, Citrobacter (Citrob. freundii, Citrob. divemis), salmonella and shigella; and also Klebsiellas (Klebs. pneumoniae, Klebs. oxytocy), Enterobacter (Ent. aerogenes, Ent. agglomerans), hafnia, serratia (Serr. marcescens), providencia, yersinia, and also the genus Acinetobacter. The antibacterial spectrum further embraces strictly anaerobic bacteria such as Bacteroides fragilis, representatives of the genus Peptococcus, Peptostreptococcus and the genus Clostridium; and also Mycoplasmas (M. pneumoniae, M. hominis, M. urealyticum) and Mycobacteria, e.g., Mycobacterium tuberculosis.

The above listing of pathogens should be interpreted merely as exemplary and in no way as restrictive. Examples that may be mentioned of diseases which may be caused by the stated pathogens or combination infections and which may be prevented, remedied or cured by the formulations of the invention include the following:

Infectious diseases in humans, such as septic infections, bone and joint infections, skin infections, postoperative wound infections, abscesses, phlegmons, wound infections, infected burns, burn wounds, infections in the oral region, infections following dental operations, septic arthritis, mastitis, tonsillitis, genital infections and eye infections.

As well as in humans, bacterial infections in other species too can be treated. Examples that may be mentioned include the following:

-   pigs: coli diarrhea, enterotoxemia, sepsis, dysenteria,     salmonellosis, metritis-mastitis-agalactia syndrome, mastitis; -   ruminants (cattle, sheep, goats): diarrhea, sepsis,     bronchopneumonia, salmonellosis, pasteurellosis, mycoplasmosis,     genital infections; -   horses: bronchopneumonias, joint ill, puerperal and postpartum     infections, salmonellosis; -   dogs and cats: bronchopneumonia, diarrhea, dermatitis, otitis,     urinary tract infections, prostatitis; -   poultry (chickens, turkeys, quails, pigeons, ornamental birds and     others): mycoplasmosis, E. coli infections, chronic respiratory     tract diseases, salmonellosis, pasteurellosis, psittacosis.

It is also possible to treat bacterial diseases associated with the breeding and keeping of farmed and ornamental fish, in which case the antibacterial spectrum extends beyond the aforementioned pathogens to embrace further pathogens such as Pasteurella, Brucella, Campylobacter, Listeria, Erysipelothris, Corynebacteria, Borellia, Treponema, Nocardia, Rickettsi, Yersinia, for example.

The active ingredient may act systemically and/or locally. For that purpose it can be administered in appropriate manner, such as orally, parenterally, pulmonically, nasally, sublingually, lingually, buccally, rectally, transdermally, conjunctivally, otically or as an implant.

For these administration routes the active ingredient can be administered in suitable administration forms.

Administration forms suitable for oral administration are known such forms which deliver the active ingredient rapidly and/or in a modified way, such as tablets (uncoated and coated tablets, such as film-coated tablets or tablets provided with enteric coatings), capsules, sugar-coated tablets, granules, pellets, powders, emulsions, suspensions and solutions.

Parenteral administration can be made with avoidance of an absorption step (intravenously, intraarterially, intracardially, intraspinally or intralumbarly) or with inclusion of absorption (intramuscularly, subcutaneously, intracutaneously, percutaneously, or intraperitoneally). Administration forms suitable for parenteral administration include preparations for injection and infusion in the form of solutions, suspensions, emulsions, lyophilisates and sterile powders.

Preference is given to parenteral administration, more particularly intravenous administration.

Examples suitable for the other administration routes are pharmaceutical forms for inhalation (including powder inhalers, nebulizers), nasal drops/solutions, sprays; capsules or tablets to be administered lingually, sublingually or buccally, suppositories, ear and eye preparations, vaginal capsules, aqueous suspensions (lotions, shaking mixtures), lipophilic suspensions, ointments, creams, milk, pastes, dusting powders or implants.

The active ingredients can be converted in conventional manner into the stated administration forms. This is done with the use of inert, nontoxic, pharmaceutically appropriate auxiliaries (excipients). These include, among others, carriers (e.g., microcrystalline cellulose), solvents (e.g. liquid polyethylene glycols), emulsifiers (e.g., sodium dodecyl sulfate), dispersants (e.g., polyvinylpyrrolidone), synthetic and natural biopolymers (e.g., albumen), stabilizers (e.g., antioxidants such as ascorbic acid), colorants (e.g., inorganic pigments such as iron oxides) or flavor and/or odor masking agents.

It has generally proven advantageous in the case of parenteral administration to administer amounts of about 5 to 250 mg/kg body weight per 24 hours in order to achieve effective results. In the case of oral administration the amount is about 5 to 100 mg/kg body weight per 24 hours.

It may nevertheless be necessary, where appropriate, to deviate from the amounts specified, specifically as a function of body weight, administration route, individual response to the active ingredient, type of formulation, and time or interval at which administration takes place.

The percentages in the tests and examples below, unless stated otherwise, are percentages by weight; parts are parts by weight. Solvent ratios, dilution ratios and concentration figures for liquid/liquid solutions are based in each case on the volume.

A. EXAMPLES

Reaction schemes which are shown for general procedures show a selection of examples, but can be employed in each case for all of the examples which refer to them.

Abbre- viations: Boc tert-butoxycarbonyl CDCl₃ deuterochloroform DCI direct chemical ionization DIEA N,N-diisopropylethylamine DMSO dimethyl sulfoxide EDC N-(3-dimethylaminoisopropyl)-N′-ethylcarbodiimide hydrochloride eq. equivalent ESI electrospray ionization (for MS) Fmoc fluorenylmethoxycarbonyl h hour HATU O-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate HOBt 1-hydroxylbenzotriazole HPLC High-pressure, high-performance liquid chromatography LC-MS liquid chromatography-coupled mass spectroscopy MS mass spectroscopy NMR nuclear magnetic resonance spectroscopy PS-DIEA N,N-diisopropylethylamine-polystyrene (Resin) R_(f) retention index (for TLC) RP-HPLC reverse phase HPLC RT room temperature R_(t) retention time (for HPLC) THF tetrahydrofuran

HPLC and LC-MS Methods

Method 1: column: Kromasil C18, L-R temperature: 30° C., flow rate=0.75 ml min⁻¹, mobile phase: A=0.01 M HClO₄, B=acetonitrile, gradient:→0.5 min 98% A→4.5 min 10% A→6.5 min 10% A

Method 2: column: Kromasil C18 60*2, L-R temperature: 30° C., flow rate=0.75 ml min⁻¹, mobile phase: A=0.01 M H₃PO₄, B=acetonitrile, gradient:→0.5 min 90% A→4.5 min 10% A→6.5 min 10% A

Method 3: column: Kromasil C18 60*2, L-R temperature: 30° C., flow rate=0.75 ml min⁻¹, mobile phase: A=0.005 M HClO₄, B=acetonitrile, gradient:→0.5 min 98% A→4.5 min 10% A→6.5 min 10% A

Method 4: column: Symmetry C18 2.1×150 mm, column oven: 50° C., flow rate=0.6 ml min⁻¹, mobile phase: A=0.6 g 30% strength hydrochloric acid/1 water, B=acetonitrile, gradient: 0.0 min 90% A→4.0 min 10% A→9 min 10% A

Method 5: Instrument: Micromass Quattro LCZ

Column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm, temperature: 40° C., flow rate=0.5 ml min⁻¹, mobile phase A=acetonitrile+0.1% formic acid, mobile phase B=water+0.1% formic acid, gradient: 0.0 min 10% A→4 min 90% A→6 min 90% A

Method 6: Instrument: Micromass Platform LCZ

Column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm, temperature: 40° C., flow rate=0.5 ml min⁻¹, mobile phase A=acetonitrile+0.1% formic acid, mobile phase B=water+0.1% formic acid, gradient: 0.0 min 10% A→4 min 90% A→6 min 90% A

Method 7: Instrument: Micromass Quattro LCZ

Column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm, temperature: 40° C., flow rate=0.5 ml min⁻¹, mobile phase A=acetonitrile+0.1% formic acid, mobile phase B=water+0.1% formic acid, gradient: 0.0 min 5% A→1 min 5% A→5 min 90% A→6 min 90% A

Method 8: column: Symmetry C18 2.1×150 mm, 5 μm, column oven: 70° C., flow rate=0.9 ml min⁻¹, mobile phase: A=acetonitrile, B=0.3 g 30% strength hydrochloric acid/1 water, gradient: 0.0 min 2% A→2.5 min 95% A→5 min 95% A

Method 9: column: Symmetry C18 3.9×150 mm, column oven: 40° C., flow rate=1.5 ml min⁻¹, mobile phase: A=water+0.05% H₃PO₄, B=acetonitrile, gradient: 0.0 min 10% B→0.6 min 10% B→3.8 min 100% B→5.0 min 100% B.

Method 10: Instrument: Waters Alliance 2790 LC; column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm; mobile phase A: water+0.1% formic acid, mobile phase B: acetonitrile+0.1% formic acid; gradient: 0.0 min 5% B→5.0 min 10% B→6.0 min 10% B; temperature: 50C, flow rate: 1.0 ml/min, UV detection: 210 nm.

Method 11: Instrument type MS: Micromass ZQ; instrument type HPLC: Waters Alliance 2790; column: Symmetry C 18, 50 mm×2.1 mm, 3.5 μm; mobile phase B: acetonitrile+0.05% formic acid, mobile phase A: water+0.05% formic acid; gradient: 0.0 min 10% B→3.5 min 90% B→5.5 min 90% B; oven: 50° C., flow rate: 0.8 ml/min, UV detection: 210 nm.

Method 12: Instrument: Waters Alliance 2790 LC; column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm; mobile phase A: water+0.05% formic acid, mobile phase B: acetonitrile+0.05% formic acid; gradient: 0.0 min 5% B→4.5 min 10% B→5.5 min 10% B; temperature: 50° C., flow rate: 1.0 ml/min, UV detection: 210 nm.

Method 13: Instrument: Micromass Quattro LCZ, HP1100; column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm; mobile phase A: water+0.05% formic acid, mobile phase B: acetonitrile+0.05% formic acid; gradient: 0.0 min 90% A→4.0 min 10% A→6.0 min 10% A; Oven: 40° C., flow rate: 0.5 ml/min, UV detection: 208-400 nm.

Method 14: Instrument: Micromass Platform LCZ, HP1100; column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm; mobile phase A: water+0.05% formic acid, mobile phase B: acetonitrile+0.05% formic acid; gradient: 0.0 min 90% A→4.0 min 10% A→6.0 min 10% A; oven: 40° C., flow rate: 0.5 ml/min, UV detection: 208-400 nm.

Method 15: Instrument: Waters Alliance 2790 LC; column: Symmetry C18, 50 mm×2.1 mm, 3.5 μm; mobile phase A: water+0.05% formic acid, mobile phase B: acetonitrile+0.05% formic acid; gradient: 0.0 min 10% B 4 4.0 min 90% B→6.0 min 90% B; temperature: 50° C., flow rate: 0.0 min 0.5 ml/min→4.0 min 0.8 ml/min, UV detection: 210 nm.

Method 16: Instrument type MS: Micromass ZQ; instrument type HPLC: Waters Alliance 2790; column: Symmetry C 18, 50 mm×2.1 mm, 3.5 μm; mobile phase B: acetonitrile+0.05% formic acid, mobile phase A: water+0.05% formic acid; gradient: 0.0 min 5% B 4.5 min 90% B 5.5 min 90% B; oven: 50° C., flow rate: 1.0 ml/, UV detection: 210 nm

Method 17: Instrument type MS: Micromass ZQ; instrument type HPLC: Waters Alliance 2790; column: Uptisphere C 18, 50 mm×2.0 mm, 3.0 μm; mobile phase B: acetonitrile+0.05% formic acid, mobile phase A: water+0.05% formic acid; gradient: 0.0 min 5% B→2.0 min 40% B→4.5 min 90% B→5.5 min 90% B; oven: 45° C., flow rate: 0.0 min 0.75 ml/min→4.5 min 0.75 ml/min→5.5 min 1.25 ml/min, WV detection: 210 nm

Method 18: Instrument: Micromass Platform LCZ with HPLC Agilent series 1100; column: Grom-SIL120 ODS-4 HE, 50 mm×2.0 mm, 3 μm; mobile phase A: 1 l water+1 ml 50% strength formic acid, mobile phase B: 1 l acetonitrile+1 ml 50% strength formic acid; gradient: 0.0 min 100% A→0.2 min 100% A→2.9 min 30% A→3.1 min 10% A→4.5 min 10% A; oven: 55° C., flow rate: 0.8 ml/min, UV detection: 208-400 nm.

Method 19: Instrument: Micromass Quattro LCZ, with HPLC Agilent series 1100; column: Grom-SIL120 ODS-4 HE, 50 mm×2.0 mm, 3 μm; mobile phase A: 1 l water+1 ml 50% strength formic acid, mobile phase B: 1 l acetonitrile+1 ml 50% strength formic acid; gradient: 0.0 min 100% A→0.2 min 100% A→2.9 min 30% A→3.1 min 10% A→4.5 min 10% A; oven: 55° C., flow rate: 0.8 ml/min, UV detection: 208-400 nm.

Method 20: Instrument type MS: Micromass ZQ; instrument type HPLC: Waters Alliance 2790; column: Grom-Sil 120 ODS-4 HE 50×2 mm, 3.0 μm; mobile phase B: acetonitrile+0.05% formic acid, mobile phase A: water+0.05% formic acid; gradient: 0.0 min 5% B→2.0 min 40% B→4.5 min 90% B→5.5 min 90% B; oven: 45° C.; flow rate: 0.0 min 0.75 ml/min→4.5 min 0.75 ml/min→5.5 min 1.25 ml/min; UV detection: 210 nm.

Method 21: Instrument type MS: Micromass ZQ; instrument type HPLC: Waters Alliance 2790; column: Grom-Sil 120 ODS-4 HE 50×2 mm, 3.0 μm; mobile phase B: acetonitrile+500 ul 50% strength formic acid/1; mobile phase A: water+500 ul 50% strength formic acid/1; gradient: 0.0 min 0% B→0.2 min 0% B→2.9 min 70% B→3.1 min 90% B→4.5 min 90% B, oven: 50° C., flow rate:0.8 ml/min; UV detection: 210 nm.

Method 22: Instrument: Micromass Quattro LCZ with HPLC Agilent series 1100; column: UPTISPHERE HDO, 50 mm×2.0 mm, 3 μm; mobile phase A: 1 l water+1 ml 50% strength formic acid, mobile phase B: 1 l acetonitrile+1 ml 50% strength formic acid; gradient: 0.0 min 100% A→0.2 min 100% A→2.9 min 30% A→3.1 min 10% A→4.5 min 10% A; oven: 55° C., flow rate: 0.8 ml/min, UV detection: 208-400 nm.

Starting Compounds Example 1A (3S)-1,3-Dimethyl-2,5-pyrrolidinedione

600 mg (5.26 mmol) of (3S)-3-methyldihydro-2,5-furandione (preparation: S. G. Davies, D. J. Dixon, J. Chem. Soc., Perkin Trans. 1, 1998, 17, 2635-2643) are introduced to a vessel together with 559 mg (0.77 ml, 5.52 mmol) of triethylamine in 5 ml of dichloromethane at 0° C. and 373 mg (5.52 mmol) of methylamine hydrochloride are added. The reaction mixture is stirred at room temperature overnight and then 938 mg (5.78 mmol) of N,N-carbonyldiimidazole are added in portions. The mixture is stirred at room temperature for 1.5 h and at reflux temperature for 30 minutes. After it has cooled to room temperature the reaction mixture is washed with 5% strength hydrochloric acid and water, the organic phase is dried over magnesium sulfate, filtered and concentrated and the product is dried under a high vacuum. This gives 605 mg of the product (88% of theory).

MS (ESI+): m/z (%)=128 (M+H⁺) (100). HPLC (method 6): R_(t)=0.81 min. ¹H-NMR (300 MHz, CDCl₃): δ=3.10 (dd, 1H), 2.99 (s, 3H), 2.90-2.82 (m, 1H), 2.32 (dd, 1H), 1.35 (d, 3H).

Example 2A (3R,4S)-3-[(2S)-2-(tert-Butoxycarbonyl)amino-3-methylbutanoyl]-1,4-dimethyl-2,5-pyrrolidinedione

684 mg (3.15 mmol) of N-(tert-butoxycarbonyl)-L-valine and 561 mg (3.46 mmol) of N,N-carbonyldiimidazole are stirred in 4 ml of tetrahydrofuran at room temperature for 2 h. Then 400 mg (3.15 mmol) of (3S)-3-1,3-dimethyl-2,5-pyrrolidinedione are added to this mixture and the whole mixture is added dropwise over the course of 30 minutes to 6.3 ml of a 1 molar solution of lithium hexamethyldisilazide in THF, which has been cooled to −65° C. After the end of the addition stirring is continued at −65° C. for 15 minutes more, and then 6 ml of saturated aqueous ammonium chloride are added. After the reaction mixture has been warmed to room temperature it is diluted with diethyl ether and the organic phase is washed with saturated aqueous sodium chloride solution and subsequently concentrated. The crude product is purified by RP-HPLC (mobile phase: water-acetonitrile, gradient). This gives 223 mg (22% of theory) of the desired product.

MS (ESI−): m/z (%)=325 (M−H⁺) (35). HPLC (method 5): R_(t)=3.99 min. ¹H-NMR (200 MHz, CDCl₃): δ=5.70 (br. d, 1H), 4.57 (dd, 1H), 3.78 (d, 1H), 3.47-3.30 (m, 1H), 2.98 (s, 3H), 2.50-2.32 (m, 1H), 1.46 (s, 9H), 1.32 (d, 3H), 1.02 (d, 3H), 0.80 (d, 3H).

In the same way as for Example 2A it is possible by reacting the corresponding N-tert-butoxycarbonyl-protected amino acids with (35)-1-(benzyloxy)-3-methyl-2,5-pyrrolidinedione (preparation: S. G. Davies, D. J. Dixon, J Chem. Soc., Perkin Trans. 1, 1998, 17, 2635-2643) to prepare the following derivatives (Examples 3A to 5A):

Example 3A (3R,4S)-1-Benzyloxy-3-[(2S)-2-(tert-butoxycarbonyl)amino-3,3-dimethylbutanoyl]-4-methyl-2,5-pyrrolidinedione

MS (ESI−): m/z (%)=431 (M−H⁺) (100). HPLC (method 6): R_(t)=4.87 min.

Example 4A (3R,4S)-1-Benzyloxy-3-[(2S)-2-(tert-butoxycarbonyl)amino-4-methylpentanoyl]-4-methyl-2,5-pyrrolidinedione

MS (ESI−): m/z (%)=431 (M−H⁺) (100). HPLC (method 6): R_(t)=4.88 min.

Example 5A (3R,4S)-1-Benzyloxy-3-[(2S)-2-(tert-butoxycarbonyl)amino-butanoyl]-4-methyl-2,5-pyrrolidinedione

MS (ESI−): m/z (%)=403 (M−H⁺) (100). HPLC (method 6): R_(t)=4.54 min.

General Instructions A: Reductive Deprotection of 1-benzyloxy-2,5-pyrrolidinediones

Deprotection takes place in a manner similar to that of S. G. Davies, D. J. Dixon, J. Chem. Soc., Perkin Trans. 1 1998, 2635-2643.

The 1-benzyloxy-2,5-pyrrolidinedione (1 eq.) is dissolved in methanol or ethanol (about 0.02 mol/l), a catalytic amount of palladium-on-carbon (10%) is added, and the mixture is stirred under a hydrogen atmosphere (atmospheric pressure) for 1 h. The reaction mixture is then filtered and concentrated. The residue is dissolved in acetonitrile (about 0.05 mol/l) and added dropwise at room temperature to a solution of 2-bromoacetophenone (1 eq) in acetonitrile (about 0.03 mol/l) at room temperature. Thereafter over a period of 2 h, 1.5 eq. of triethylamine in acetonitrile (about 0.35 mol/l) are added dropwise to the reaction mixture. The reaction mixture is stirred at room temperature overnight and concentrated and the crude product is purified by means of RP-HPLC (mobile phase: acetonitrile/water or acetonitrile/water+0.3 ml 37% strength hydrochloric acid/1, gradient).

Example 6A (3R,4S)-3-[(2S)-2-(tert-Butoxycarbonyl)amino-3,3-dimethylbutanoyl]-4-methyl-2,5-pyrrolidinedione

Preparation is in accordance with general instructions A.

MS (ESI+): m/z (%)=327 (M+H⁺) (100). HPLC (method 5): R_(t)=3.87 min.

Example 7A (3R,4S)-3-[(2S)-2-(tert-Butoxycarbonyl)amino-4-methylpentanoyl]-4-methyl-2,5-pyrrolidinedione

Preparation is in accordance with general instructions A.

MS (ESI−): m/z (%)=325 (M−H⁺) (100). HPLC (method 5): R_(t)=3.91 min.

Example 8A (3R,4S)-3-[(2S)-2-(tert-Butoxycarbonyl)amino-butanoyl]-4-methyl-2,5-pyrrolidinedione

Preparation is in accordance with general instructions A.

MS (ESI−): m/z (%)=297 (M−H⁺) (100). HPLC (method 6): R_(t)=3.50 min.

Example 9A (3R,4S)-3-[(2S)-2-Amino-3-methylbutanoyl]-4-methyl-2,5-pyrrolidinedione hydrochloride

A solution, cooled at 0° C., of 4.40 g (14.09 mmol) of (3R,4S)-3-[(2S)-2-(tert-butoxycarbonyl)amino-3-methylbutanoyl]-4-methyl-2,5-pyrrolidinedione (preparation: S. G. Davies, D. J. Dixon, J. Chem. Soc., Perkin Trans. 1, 1998, 17, 2635-2643) is admixed dropwise with 35 ml of 4N hydrochloric acid solution in 1,4-dioxane. When the addition is at an end the mixture is warmed to room temperature and stirred for 2 h, after which the mixture is concentrated under reduced pressure. The crude product can be used directly in the next stage. If desired the residue is treated with diethyl ether and the crystals precipitated are filtered off and dried under a high vacuum. Yield: 2.99 g of colorless crystals (86% of theory).

MS (ESI+): m/z (%)=213 (M+H⁺) (100). HPLC (method 4): R_(t)=0.41 min.

In the same way as for Example 9A it is possible, from the corresponding tert-butoxycarbonylamino derivatives, by treatment with hydrochloric acid/dioxane, to prepare the following amines (Examples 10A to 13A) in the form of their hydrochlorides:

Example 10A (3R,4S)-3-[(2S)-2-Amino-3-methylbutanoyl]-1,4-dimethyl-2,5-pyrrolidinedione hydrochloride

MS (ESI+): m/z (%)=227 (M+H⁺) (80).

Example 11A (3R,4S)-3-[(2S)-2-Amino-3,3-dimethylbutanoyl]-4-methyl-2,5-pyrrolidinedione hydrochloride

MS (ESI+): m/z (%)=227 (M+H⁺) (100).

Example 12A (3R,4S)-3-[(2S)-2-Amino-4-methylpentanoyl]-4-methyl-2,5-pyrrolidinedione hydrochloride

MS (ESI+): m/z (%)=227 (M+H⁺) (100).

Example 13A (3R,4S)-3-[(2S)-2-Amino-butanoyl]-4-methyl-2,5-pyrrolidinedione hydrochloride

MS (ESI+): m/z (%)=199 (M+H⁺) (100).

General Instructions B: Reaction of 3-aminopropionic acid alkyl esters with carboxylic acids

A solution of the carboxylic acid derivative (1.2-1.5 eq.) in absolute dichloromethane or a mixture (5:1 to 1:1) of absolute dichloromethane and N,N-dimethylformamide (about 0.1 to 0.3 mol/l) is admixed at 0° C. first with an equimolar amount of HATU and then with the 3-aminopropionic acid alkyl ester (1 eq., optionally as a solution in N,N-dimethylformamide or dichloromethane/N,N-dimethylformamide mixtures). Subsequently at 0° C. a solution of 2.5-3.5 eq. of diisopropylethylamine in a 1:1 mixture of absolute dichloromethane and N,N-dimethylformamide (0.2-1 mol/l) is added dropwise over a period of 1 h. When the addition is at an end the reaction mixture is stirred at 0° C. for 30 minutes more and then at room temperature overnight, before being concentrated under reduced pressure. The product can be obtained by chromatography on silica gel (mobile phases; mixtures of cyclohexane/ethyl acetate or mixtures of dichloromethane and ethanol) or by RP-HPLC (mobile phases: variable gradients of water and acetonitrile), or alternatively by a combination of both methods.

((S)-3-Amino-3-phenylpropionic acid methyl ester, preparation: S. G. Davies et. al., J. Chem. Soc., Chem. Comm., 1993,14, 1153-1155).

Alternatively the reaction can take place by the following method as well:

A solution of the 3-aminopropionic acid alkyl ester (1 eq.) in absolute dichloromethane or a mixture (5:1 to 1:1) of absolute dichloromethane and N,N-dimethylformamide (about 0.1 to 0.3 mol/l) is admixed with the carboxylic acid derivative (1.1-1.5 eq.), triethylamine (3 eq.), HOBt (3 eq.) and finally 1.2 eq. of EDC. The reaction mixture is stirred at room temperature (2 h to overnight), before being concentrated under reduced pressure. The residue is taken up in ethyl acetate or dichloromethane and the organic phase is washed with water, saturated sodium hydrogencarbonate solution and saturated sodium chloride solution, dried over sodium sulfate, filtered and concentrated. The product can be purified by chromatography on silica gel (mobile phases: mixtures of cyclohexane/ethyl acetate or mixtures of dichloromethane and ethanol) or by RP-HPLC (mobile phases: variable gradients of water and acetonitrile), or alternatively by a combination of both methods.

Example 14A Methyl (3S)-3-{[(2E)-3-(1,3-benzodioxol-5-yl)-2-propenoyl]amino}-3-phenylpropionate

Preparation takes place in accordance with general instructions B.

¹H-NMR (300 MHz, d₆-DMSO): δ=8.50 (d, 1H), 7.38-7.21 (m, 6H), 7.14 (d, 1H), 7.06 (dd, 1H), 6.93 (d, 1H), 6.49 (d, 1H), 6.05 (s, 2H), 5.32 (q, 1H), 3.56 (s, 3H), 2.91-2.78 (m, 2H). MS (ESI+): m/z (%)=354 (M+H⁺) (65).

General Instructions C: Hydrolysis of the propionic acid alkyl esters

The propionic acid alkyl ester is introduced to a vessel in a 3:1 mixture of ethanol and water (about 0.1-0.15 mol/l) and 5 eq. of 40% strength sodium hydroxide solution are added. The reaction mixture is stirred at room temperature for 24 h, acidified with dilute hydrochloric acid (to a pH of about 3) and concentrated. The residue is taken up in ethyl acetate and washed with saturated aqueous sodium chloride solution. The organic phase is dried over magnesium sulfate, filtered and concentrated. The product obtained can be used without further purification in the next stage.

An alternative option is to use the following method:

The propionic acid alkyl ester is introduced to a vessel in a 1:1 mixture of dioxane and water (about 0.1-0.15 mol/l) and 3 eq. of a solution of potassium hydroxide in methanol (100 mg/ml) are added. The reaction mixture is stirred at room temperature for 2 h and then concentrated. The residue is taken up in water and acidified with dilute hydrochloric acid. The aqueous phase is extracted three times with a 1:1 mixture of dichloromethane and ethyl acetate. The combined organic phases are dried over sodium sulfate, filtered and concentrated. The product obtained can be used without further purification in the next stage.

Example 15A (3S)-3-{[(2E)-3-(1,3-Benzodioxol-5-yl)-2-propenoyl]amino}-3-phenylpropionic acid

Preparation takes place in accordance with general instructions C.

¹H-NMR (300 MHz, d₆-DMSO): δ=12.21 (s, 1H), 8.50 (d, 1H), 7.38-7.21 (m, 6H), 7.14 (d, 1H), 7.06 (dd, 1H), 6.93 (d, 1H), 6.50 (d, 1H), 6.06 (s, 2H), 5.31 (q, 1H), 2.83-2.66 (m, 2H). MS (ESI+): m/z (%)=340 (M+H⁺) (85). HPLC (method 5): R_(t)=3.47 min.

The propionic acid derivatives obtained in this way can be reacted in accordance with general instructions D (acylation of 3-[2-aminoalkanoyl]-2,5-pyrrolidinedione hydrochloride derivatives with carboxylic acid derivatives).

General Instructions D: Acylation of 3-[2-aminoalkanoyl]-2,5-pyrrolidinedione hydrochloride derivatives with carboxylic acid derivatives

A solution of carboxylic acid derivative (1.2-1.5 eq.) in absolute dichloromethane or a mixture (5:1 to 1:1) of absolute dichloromethane and N,N-dimethylformamide (about 0.1 to 0.3 mol/l) is admixed at 0° C. first with an equimolar amount of HATU and then with the 3-[2-aminoalkanoyl]-2,5-pyrrolidinedione hydrochloride derivative (1 eq., optionally as a solution in N,N-dimethylformamide or dichloromethane/N,N-dimethylformamide mixtures). Subsequently at 0° C. a solution of 2.5-3.5 eq. of diisopropylethylamine in a 1:1 mixture of absolute dichloromethane and N,N-dimethylformamide (0.2-1 mol/l) is added dropwise over a period of 1 h. After the end of the addition the reaction mixture is stirred at 0° C. for 30 minutes more and then at room temperature overnight, before being concentrated under reduced pressure. The product can be obtained by chromatography on silica gel (mobile phases: mixtures of cyclohexane/ethyl acetate or mixtures of dichloromethane and ethanol) or by RP-HPLC (mobile phases: variable gradients of water and acetonitrile), or alternatively by a combination of both methods.

Alternatively the reaction may also take place by the following method:

A solution of the 3-[2-aminoalkanoyl]-2,5-pyrrolidinedione hydrochloride derivative (1 eq.) in absolute dichloromethane or a mixture (5:1 to 1:1) of absolute dichloromethane and N,N-dimethylformamide (about 0.1 to 0.3 mol/l) is admixed with the carboxylic acid derivative (1.1-1.5 eq.), triethylamine (3 eq.), HOBt (3 eq.) and finally 1.2 eq. of EDC. The reaction mixture is stirred at room temeprature (2 h to overnight) before being concentrated under reduced pressure. The residue is taken up in ethyl acetate or dichloromethane and the organic phase is washed with water, saturated sodium hydrogencarbonate solution and saturated sodium chloride solution, dried over sodium sulfate, filtered and concentrated. The product can be purified by chromatography on silica gel (mobile phases: mixtures of cyclohexane/ethyl acetate or mixtures of dichloromethane and ethanol) or by RP-HPLC (mobile phases: variable gradients of water and acetonitrile), or alternatively by a combination of both methods.

Example 16A tert-Butyl ((S)-2-{(S)-2-methyl-1-[1-((3R,4S)-4-methyl-2,5-dioxo-pyrrolidin-3-yl)-methanoyl]-propylcarbamoyl}-1-phenylethyl)carbamate

Preparation is in accordance with general instructions D.

¹H-NMR (400 MHz, d₆-DMSO): δ=11.45 (s, 1H), 7.98 (d, 1H), 7.31-7.24 (m, 5H), 7.20 (br. s, 1H), 4.88-4.82 (br. s, 1H), 4.69 (br. s, 1H), 3.98 (d, 1H), 2.95-2.89 (m, 1H), 2.77-2.69 (m, 1H), 2.51-2.44 (m, 1H), 2.35-2.29 (m, 1H), 1.10 (d, 3H), 0.85 (d, 3H), 0.78 (d, 3H). MS (ESI+): m/z (%)=460 (M+H⁺) (100). HPLC (method 6): R_(t)=3.90 min.

General Instructions E: Deblocking of Boc-protected derivatives

The tert-butyloxycarbonyl (BOC) protected amine derivative (optionally as a solution in dioxane) is admixed at 0° C. or room temperature with 4N hydrochloric acid solution in 1,4-dioxane (about 0.1 mol/l) and stirred at room temperature for 2 to 24 h before being concentrated under reduced pressure. The residue can be reacted further without additional purification or if desired is desired is treated with dichloromethane and diethyl ether (about 1:2). The precipitated crystals are filtered off with suction and dried under a high vacuum. This gives the product as the hydrochloride.

Example 17A (S)-3-Amino-{(S)-2-methyl-1-[1-((3R,4S)-4-methyl-2,5-dioxopyrrolidin-3-yl)-methanoyl]-propyl}-3-phenylpropionamide hydrochloride

Preparation takes place in accordance with general instructions E.

¹H-NMR (200 MHz, d₆-DMSO): δ=11.49 (br. s, 1H), 8.5 (br. s, about 3H), 7.54-7.32 (m, 5H), 4.69-4.55 (m, 2H), 3.89 (d, 1H), 3.06-2.80 (m, 3H), 2.39-2.25 (m, 1H), 1.01 (d, 3H), 0.81 (d, 3H), 0.75 (d, 3H). MS (ESI+): m/z (%)=360 (M−Cl)⁺ (100). HPLC (method 4): R_(t)=1.44 min.

Example 18A Methyl 3-amino-3-(2,3-dihydro-1,4-benzodioxin-6-yl)propionate

3-Amino-3-(2,3-dihydro-1,4-benzodioxin-6-yl)propionic acid [synthesis according to instructions known from the literature (e.g., L. Lázár, T. Martinek, G. Bernáth, F. Fülöp, Synth. Comm. 1998, 28, 219-224)]is introduced into a vessel in methanol (about 0.5 to 1.0 mol/l) and admixed dropwise at 0° C. with 1.2 eq of thionyl chloride. When the addition has been made the reaction mixture is stirred at room temperature overnight and subsequently concentrated. The residue is dissolved in a little methanol and the product is precipitated with diethyl ether. The solid is filtered off with suction, washed repeatedly with diethyl ether and dried under reduced pressure.

¹H-NMR (300MHz, d₆-DMSO): δ=8.51 (br. s, 3H), 7.07 (d, 1H), 6.95 (dd, 1H), 6.88 (d, 1H), 4.48 (dd, 1H), 4.24 (s, 4H), 3.57 (s, 3H), 3.12 (dd, 1H), 2.94 (dd, 1H). MS (ESI+): m/z=238 (M+H⁺).

In the same way as for Example 1A the following compounds (Example 19A to 26A) can be obtained by reacting (3S)-3-methyldihydro-2,5-furandione with the corresponding primary amines, hydroxylamine derivatives or hydrazine derivatives. The crude products can be purified by RP-HPLC (mobile phase: water-acetonitrile, gradient).

Example Structure MW MS HPLC 19A

219.24 HPLC (method6): R_(t) = 3.37min 20A

156.18 MS (ESI+),m/z:157 (M + H)⁺ HPLC (method19): R_(t) = 2.62min 21A

157.17 MS (DCI),m/z: 175(M + NH₄)⁺ HPLC (method20): R_(t) = 1.70min 22A

228.25 MS (DCI),m/z: 246(M + NH₄)⁺ HPLC (method20): R_(t) = 2.09min 23A

143.14 MS (ESI+),m/z: 144(M + H)⁺ 24A

276.29 MS (DCI),m/z: 294(M + NH₄)⁺ HPLC (method21): R_(t) = 2.80min 25A

155.20 MS (ESI+),m/z: 156(M + H)⁺ HPLC (method19): R_(t) = 3.26min 26A

141.17 MS (ESI+),m/z: 142(M + H)⁺ HPLC (method19): R_(t) = 2.78min General Instructions F: Reaction of N-tert-butoxycarbonyl-protected amino acids with 2,5-pyrrolidinedione derivatives

The N-tert-butoxycarbonyl-protected amino acid (1 eq.) and N,N-carbonyldiimidazole (1.1 eq.) are stirred in tetrahydrofuran (about 0.1-1 mol/l) at room temperature for 2 h. The 2,5-pyrrolidinedione (1 eq.) is then added to this mixture and the total mixture is added dropwise over the course of 30 minutes to a 1 molar solution of lithium hexamethyldisilazide (2 eq.) in THF, which is cooled at −65° C. After the end of the addition stirring is continued at −65° C. for 15 minutes more, and then saturated aqueous ammonium chloride solution is added. After the reaction mixture has been warmed to room temperature it is diluted with diethyl ether and the organic phase is washed with saturated aqueous sodium chloride solution, dried over magnesium sulfate, filtered and subsequently concentrated. The crude product is purified by RP-HPLC (mobile phase: water-acetonitrile, gradient).

In accordance with general instructions F it is possible by reacting the corresponding N-tert-butoxycarbonyl-protected amino acids (for the preparation of non-natural alpha-amino acids see, for example, A. A. Cordi et al., J. Med. Chem. 2001, 44, 787-805; K. Mai, G. Patil, Tetrahedron Lett. 1984, 25, 4583-4586; N. A. Hassan, E. Bayer, J. C. Jochims, J. Chem. Soc., Perkin Trans. 1 1998, 3747-3757; for the tert-butoxycarbonyl protection see, e.g., T. W. Greene, P. G. M. Wuts, Protective Groups in Organic Synthesis, 3^(rd) Edt. 1999, J. Wiley & Sons, Inc.) with 2,5-pyrrolidinediones to obtain the following derivatives (Examples 27A to 52A):

Example Structure MW MS HPLC 27A

432.51 MS (ESI−),m/z: 431(M − H)⁻ HPLC (method10): R_(t) = 4.10min 28A

458.55 MS (ESI−),m/z: 457(M − H)⁻ HPLC (method12): R_(t) = 4.12min 29A

444.53 MS (ESI−),m/z: 443(M − H)⁻ HPLC (method18): R_(t) = 4.11min 30A

432.51 MS (ESI−),m/z: 431(M − H)⁻ HPLC (method6): R_(t) = 4.88min 31A

432.51 MS (ESI−),m/z: 431(M − H)⁻ HPLC (method13): R_(t) = 5.08min 32A

432.51 MS (ESI−),m/z: 431(M − H)⁻ HPLC (method11): R_(t) = 3.72min 33A

446.54 MS (ESI−),m/z: 445(M − H)⁻ HPLC (method17): R_(t) = 4.42min 34A

352.43 MS (ESI−),m/z: 351(M − H)⁻ HPLC (method14): R_(t) = 4.61min 35A

416.47 MS (ESI−),m/z: 415(M − H)⁻ HPLC (method16): R_(t) = 3.49min 36A

354.44 MS (ESI−),m/z: 353(M − H)⁻ HPLC (method16): R_(t) = 3.44min 37A

380.36 MS (ESI−),m/z: 379(M − H)⁻ HPLC (method17): R_(t) = 3.72min 38A

434.49 MS (ESI−),m/z: 433(M − H)⁻ HPLC (method17): R_(t) = 3.98min 39A

454.52 MS (ESI−),m/z: 453(M − H)⁻ HPLC (method22): R_(t) = 4.41min 40A

362.42 MS (ESI−),m/z: 361(M − H)⁻ HPLC (method18): R_(t) = 3.74min 41A

355.43 MS (ESI+),m/z: 378(M + Na)⁺ HPLC (method19): R_(t) = 4.12min 42A

356.42 MS (ESI−),m/z: 355(M − H)⁻ HPLC (method20): R_(t) = 3.64min 43A

427.50 MS (ESI−),m/z: 426(M − H)⁻ HPLC (method20): R_(t) = 3.73min 44A

342.39 MS (ESI−),m/z: 341(M − H)⁻ HPLC (method19): R_(t) = 4.18min 45A

446.54 MS (ESI−),m/z: 445(M − H)⁻ HPLC (method20): R_(t) = 4.02min 46A

381.47 MS (ESI−),m/z: 380(M − H)⁻ HPLC (method21): R_(t) = 3.43min 47A

475.54 MS (ESI−),m/z: 474(M − H)⁻ HPLC (method20): R_(t) = 3.91min 48A

354.44 MS (ESI−),m/z: 353(M − H)⁻ HPLC (method18): R_(t) = 3.80min 49A

340.42 MS (ESI−),m/z: 339(M − H)⁻ HPLC (method20): R_(t) = 3.61min 50A

501.58 MS (ESI−),m/z: 500(M − H)⁻ HPLC (method21): R_(t) = 3.93min 51A

453.53 MS (ESI−),m/z: 452(M − H)⁻ HPLC (method21): R_(t) = 3.61min 52A

430.51 MS (ESI+),m/z: 453(M + Na)⁺ HPLC (method20): R_(t) = 4.32min

In accordance with general instructions A it is possible to obtain the following compounds (Example 53A to 64A):

Example Structure MW MS HPLC 53A

326.40 MS (ESI+),m/z: 349(M + Na)⁺ HPLC (method12): R_(t) = 2.97min 54A

352.43 MS (ESI−),m/z: 351(M − H)⁻ HPLC (method12): R_(t) = 3.23min 55A

326.39 MS (ESI−),m/z: 325(M − H)⁻ HPLC (method5): R_(t) = 3.91min 56A

326.39 MS (ESI−),m/z: 325(M − H)⁻ HPLC (method12): R_(t) = 2.88min 57A

326.39 MS (ESI−),m/z: 325(M − H)⁻ HPLC (method13): R_(t) = 4.25min 58A

340.42 MS (ESI−),m/z: 339(M − H)⁻ HPLC (method17): R_(t) = 3.59min 59A

310.35 MS (ESI−),m/z: 309(M − H)⁻ HPLC (method16): R_(t) = 2.41min 60A

328.26 MS (ESI+),m/z: 351(M + Na)⁺ HPLC (method20): R_(t) = 3.18min 61A

338.40 MS (ESI−),m/z: 337(M − H)⁻ HPLC (method17): R_(t) = 3.57min 62A

340.42 MS (ESI+),m/z: 341(M + H)⁺ HPLC (method20): R_(t) = 3.79min 63A

324.38 MS (ESI−),m/z: 323(M − H)⁻ HPLC (method19): R_(t) = 4.02min 64A

350.41 MS (ESI−),m/z: 349(M − H)⁻ HPLC (method18): R_(t) = 3.66min

Compound 64A was formed in the course of the reaction of compound 39A.

General Instructions G: Deblockins of benzyloxycarbonyl-protected hydrazine derivatives

The benzyloxycarbonyl-protected hydrazine derivative (1 eq.) is dissolved in methanol or ethanol (about 0.05 mol/l), a catalytic amount of palladium-on-carbon (10%) is added and the mixture is stirred under a hydrogen atmosphere (atmospheric pressure) for 3-4 h. The reaction mixture is then filtered and concentrated. The crude product can be reacted without further purification.

In accordance with general instructions G is it possible to obtain the following compounds (Example 65A and 66A):

Example Structure MW MS HPLC 65A

341.41 MS (ESI−),m/z: 340(M − H)⁻ HPLC (method19): R_(t) = 4.00min 66A

367.44 MS (ESI−),m/z: 366(M − H)⁻ HPLC (method20): R_(t) = 3.47min

In accordance with general instructions E it is possible to obtain the following compounds (Example 67A to 93A):

Ex- ample Structure MW 67A

226.28 68A

252.32 69A

238.29 70A

226.28 71A

226.28 72A

226.28 73A

240.30 74A

252.32 75A

318.38 76A

210.23 77A

254.33 78A

280.25 79A

228.25 80A

262.31 81A

250.30 82A

255.32 83A

256.30 84A

227.27 85A

242.28 86A

281.36 87A

240.30 88A

241.29 89A

254.33 90A

240.30 91A

267.33 92A

253.30 93A

224.26

Example 94A Methyl (S)-3-amino-3-phenylpropionate

2.3 g (11.65 mmol) of (S)-3-amino-3-phenylpropionic acid are introduced to a vessel in 100 ml of methanol, and a catalytic amount of concentrated sulfuric acid (0.02 eq.) is added. The reaction mixture is heated at reflux for 24 h and then concentrated. The crude product can be used without further purification in the next stage.

Yield: 2.7 g (65% of theory). ¹H-NMR (300 MHz, d₆-DMSO): δ=8.50 (s, 2H), 7.52-7.37 (m, 5H), 4.61 (t, 1H), 3.58 (s, 3H), 3.13 (dd, 1H), 2.98 (dd, 1H). MS (ES+): m/z (%)=180 (M+H)⁺ (100).

General Instructions H: Synthesis of the beta-amino Acid methyl esters

The beta-amino acid (1 eq) [synthesis in accordance with instructions known from the literature, e.g., S. Rault, P. Dallemagne, M. Robba, Bull. Soc. Chim. Fr., 1987, 1079-1083; L. Lázár, T. Martinek, G. Bernáth, F. Fülöp, Synth. Comm., 1998, 28, 219-224]is suspended in methanol (concentration 0.3-1 mol/l) at temperatures between −40° C. and 0° C. Thionyl chloride (2 eq) is added dropwise and the reaction mixture is warmed to room temperature and stirred overnight. It is evaporated to dryness and then the residue is taken up in water and washed twice with ethyl acetate. The organic phase is discarded and the aqueous phase is neutralized with saturated sodium hydrogencarbonate solution and again extracted three times with ethyl acetate. The organic phases of the final extraction are dried over sodium sulfate or magnesium sulfate, decanted and evaporated to dryness. Alternatively the crude product can be worked up by dissolving it in a little methanol and recrystallizing the product by adding diethyl ether.

In accordance with general working instructions H it is possible to prepare the following compounds (Example 95A to 108A):

Example Structure MW MS HPLC/NMR  95A

180.2 MS (ESI+),m/z: 180(M + H)⁺  96A

235.3 MS (DCI),m/z: 236(M + H)⁺  97A

256.3 MS (ESI+),m/z: 257(M + H)⁺ HPLC (method 5):R_(t) = 3.68 min  98A

248.1 MS (ESI+),m/z: 248(M + H)⁺  99A

255.3 MS (DCI),m/z: 256(M + H)⁺ 100A

197.2 MS (DCI),m/z: 198(M + H)⁺ 101A

209.2 ¹H-NMR (300MHz,CDCl₃): δ = 2.61-2.68(m,2H); 3.69(s, 3H);3.80(s, 3H); 4.40(dd,1H); 6.80(dd, 1H);6.90-6.96(m, 2H);7.20-7.29(m, 1H) 102A

221.3 MS (DCI),m/z: 222(M + H)⁺ 103A

230.3 MS (ESI+),m/z: 231(M + H)⁺ HPLC (method 20):R_(t) = 1.70 min 104A

229.3 MS (ESI+),m/z: 230(M + H)⁺ HPLC (method 19):R_(t) = 1.75 min 105A

185.3 MS (ESI+),m/z: 186(M + H)⁺ 106A

169.2 MS (ESI+),m/z: 170(M + H)⁺ 107A

237.3 MS (ESI+),m/z: 238(M + H)⁺ 108A

223.2 MS (ESI+),m/z: 224(M + H)⁺

In accordance with general instructions B it is possible to obtain the following compounds (Example 109A to 117A):

Example Structure MW MS HPLC 109A

430.46 MS (ESI+),m/z (%): 431(M + H)⁺ HPLC (method12): R_(t) = 2.51min 110A

387.82 MS (ESI+),m/z (%): 388(M + H)⁺ HPLC (method12): R_(t) = 3.10min 111A

371.36 MS (ESI+),m/z (%): 372(M + H)⁺ HPLC (method17): R_(t) = 3.48min 112A

395.45 MS (ESI+),m/z (%): 396(M + H)⁺ HPLC (method17): R_(t) = 3.93min 113A

404.42 MS (ESI+),m/z (%): 405(M + H)⁺ HPLC (method19): R_(t) = 2.40min 114A

411.46 MS (ESI+),m/z (%): 412(M + H)⁺ HPLC (method20): R_(t) = 3.20min 115A

334.37 MS (ESI+),m/z (%): 335(M + H)⁺ HPLC (method18): R_(t) = 3.36min 116A

384.43 MS (ESI+),m/z (%): 385(M + H)⁺ HPLC (method21): R_(t) = 3.38min 117A

385.42 MS (ESI+),m/z (%): 386(M + H)⁺ HPLC (method21): R_(t) = 2.76min General Instructions I: Reaction of 3-aminopropionic acid alkyl esters with carbonyl chlorides

The 3-aminopropionic acid alkyl ester is introduced to a vessel in dichloromethane (about 0.1-0.4 mol/l) at RT and 2 to 3 eq. of diisopropylethylamine and 1.2 eq. of the carbonyl chloride are added. The mixture is stirred at room temperature for 2 to 3 h. Then water is added to the reaction mixture and the organic phase is separated off, dried over sodium sulfate, filtered and concentrated. The residue can be recrystallized from dichloromethane and diethyl ether or purified by means of chromatography on silica gel (mobile phase: mixtures of dichloromethane and ethyl acetate).

In accordance with general instructions I it is possible to obtain the following compounds (Example 118A to 122A):

Example Structure MW MS HPLC 118A

443.50 MS (ES+),m/z (%): 444(M + H)⁺ 119A

375.43 MS (ES+),m/z (%): 376(M + H)⁺ HPLC (method9): R_(t) = 4.59min 120A

381.43 MS (ES+),m/z (%): 382(M + H)⁺ HPLC (method9): R_(t) = 3.65min 121A

337.42 MS (ES+),m/z (%): 338(M + H)⁺ HPLC (method9): R_(t) = 4.52min 122A

413.52 MS (ES+),m/z (%): 414(M + H)⁺ HPLC (method9): R_(t) = 4.91min

In accordance with general instructions C it is possible to obtain the following compounds (Example 123A to 136A):

Example Structure MW MS HPLC 123A

416.43 MS (ESI+),m/z (%): 417(M + H)⁺ HPLC (method17): R_(t) = 2.90min 124A

373.79 MS (ESI+),m/z (%): 374(M + H)⁺ HPLC (method16): R_(t) = 2.75min 125A

357.34 MS (ESI+),m/z (%): 358(M + H)⁺ HPLC (method17): R_(t) = 3.20min 126A

381.43 MS (ESI+),m/z (%): 382(M + H)⁺ HPLC (method17): R_(t) = 3.59min 127A

390.39 MS (ESI+),m/z (%): 391(M + H)⁺ HPLC (method20): R_(t) = 2.27min 128A

397.43 MS (ESI+),m/z (%): 398(M + H)⁺ HPLC (method19): R_(t) = 2.11min 129A

320.35 MS (ESI+),m/z (%): 321(M + H)⁺ HPLC (method20): R_(t) = 2.65min 130A

370.41 MS (ESI+),m/z (%): 371(M + H)⁺ HPLC (method19): R_(t) = 2.65min 131A

371.39 MS (ESI+),m/z (%): 372(M + H)⁺ HPLC (method20): R_(t) = 2.35min 132A

338.37 MS (ESI+),m/z (%): 339(M + H)⁺ HPLC (method18): R_(t) = 2.72min 133A

429.48 MS (ES+),m/z (%): 430(M + H)⁺ HPLC (method9): R_(t) = 4.31min 134A

361.40 MS (ES+),m/z (%): 362(M + H)⁺ 135A

309.37 MS (ES+),m/z (%): 310(M + H)⁺ HPLC (method9): R_(t) = 4.04min 136A

385.47 MS (ES+),m/z (%): 386(M + H)⁺

Compound 132A was formed as a by-product during the preparation of compound 129A.

The propionic acid derivatives obtained in this way can be reacted in accordance with general instructions D (acylation of 3-[2-aminoalkanoyl]-2,5-pyrrolidinedione hydrochloride derivatives with carboxylic acid derivatives).

General Instructions J: Preparation of N-tert-butoxycarbonyl-protected beta-amino acids

The beta-amino acid (1 eq.) [synthesis in accordance with instructions known from the literature, e.g., S. Rault, P. Dallemagne, M. Robba, Bull. Soc. Chim. Fr., 1987, 1079-1083; L. Lázár, T. Martinek, G. Bernáth, F. Fülöp, Synth. Comm., 1998, 28, 219-224]is introduced to a vessel in water (concentration about 0.3-1 mol/l), and triethylamine (1.5-3 eq.) is added. Then a solution of 2-(tert-butoxycarbonyl-oximino)phenylacetonitrile (1.1 eq.) in dioxane (0.3-1 mol/l) is added. The reaction mixture is stirred at room temperature for 3 h, diluted with water and washed with diethyl ether. The aqueous phase is acidified with 5% strength citric acid (to a pH of about 2) and extracted three times with ethyl acetate. The combined organic phases are washed with saturated sodium chloride solution, dried over sodium sulfate, filtered and concentrated. The crude product can optionally be recrystallized from ethyl acetate/n-hexane.

In accordance with general instructions J it is possible to obtain the following compounds (Example 137A to 150A):

Example Structure MW MS HPLC 137A

310.3 MS (ESI+),m/z: 311(M + H)⁺ HPLC (method8): R_(t) = 3.87min 138A

323.34 MS (ESI+),m/z: 324(M + H)⁺ HPLC (method8): R_(t) = 2.39min 139A

371.44 MS (ESI+),m/z: 372(M + H)⁺ HPLC (method9): R_(t) = 4.47min 140A

295.34 MS (ESI+),m/z: 296(M + H)⁺ 141A

323.35 HPLC (method9): R_(t) = 3.96min 142A

315.37 MS (ESI−),m/z: 314(M − H)⁻ HPLC (method21): R_(t) = 3.21min 143A

316.36 MS (ESI+),m/z: 317(M + H)⁺ HPLC (method19): R_(t) = 3.47min 144A

295.33 MS (ESI+),m/z: 296(M + H)⁺ HPLC (method20): R_(t) = 3.00min 145A

325.36 HPLC (method9): R_(t) = 3.76min 146A

266.30 MS (DCI),m/z: 167(M − 100 + H)⁺ HPLC (method9): R_(t) = 1.92min 147A

309.32 MS (ESI−),m/z: 308(M − H)⁻ HPLC (method13): R_(t) = 3.69min 148A

323.39 MS (ESI−),m/z: 322(M − H)⁻ HPLC (method14): R_(t) = 4.35min 149A

295.33 MS (ESI+),m/z: 296(M + H)⁺ 150A

316.36 MS (ESI+),m/z: 317(M + H)⁺ HPLC (method21): R_(t) = 2.14min

Example 151A (3S)-3-[(tert-Butoxycarbonyl)amino]-3-phenylpropionic acid

2.82 g (17 mmol) of (S)-3-amino-3-phenylpropionic acid are suspended in 60 ml of dioxane and at 0° C. 4.1 g (18.8 mmol) of di-tert-butyl dicarbonate (Boc anhydride) and 43 ml of a 1N sodium hydroxide solution in water are added. The reaction mixture is stirred at 0° C. for another 30 minutes and then at room temperature for 3 h. Subsequently the reaction mixture is concentrated and the residue is taken up in methylene chloride. The organic phase is washed with 1N hydrochloric acid and saturated sodium chloride solution, dried over magnesium sulfate and concentrated. The crude product (3.12 g) can be reacted further without additional purification.

MS (ES−): m/z (%)=264 (M−H)⁻ (100). HPLC (method 14): R_(t)=3.89 min.

Example 152A (3S)-3-[(tert-Butoxycarbonyl)methylamino]-3-phenylpropionic acid

500 mg (1.88 mmol) of (3S)-3-[(tert-butoxycarbonyl)amino]-3-phenylpropionic acid are introduced to a vessel in 6 ml of tetrahydrofuran, and at 0° C. 2.14 g (15.1 mmol) of iodomethane are added. Then 226 mg (5.65 mmol) of a 60% dispersion of sodium hydride in mineral oil are added in portions. The reaction mixture is warmed to room temperature and stirred overnight. Subsequently 5 ml of water are added cautiously and the reaction mixture is concentrated. The residue is taken up in ethyl acetate. The organic phase is washed with water, dried over magnesium sulfate, filtered and concentrated. The crude product (110 mg) can be reacted further without additional purification.

MS (ESI−): m/z=278 (M−H)⁻. HPLC (method 14): R_(t)=4.27 min.

In accordance with general instructions D it is possible to obtain the following compounds (Example 153A to 170A):

Example Structure MW MS HPLC 153A

517.58 MS (ESI+),m/z: 518(M + H)⁺ HPLC (method8): R_(t) = 2.60min 154A

504.54 MS (ESI−),m/z: 503(M − H)⁻ HPLC (method6):R_(t) = 3.99 min 155A

565.67 MS (ESI+),m/z: 566(M + H)⁺ HPLC (method16):R_(t) = 3.45 min 156A

489.57 MS (ESI+),m/z: 490(M + H)⁺ HPLC (method16):R_(t) = 2.90 min 157A

517.58 MS (ESI+),m/z: 518(M + H)⁺ HPLC (method16):R_(t) = 2.89 min 158A

485.58 MS (ESI−),m/z: 484(M − H)⁻ HPLC (method20):R_(t) = 3.72 min 159A

487.59 MS (ESI+),m/z: 488(M + H)⁺ HPLC (method17):R_(t) = 3.73 min 160A

473.57 MS (ESI−),m/z: 472(M − H)⁻ HPLC (method12):R_(t) = 3.20 min 161A

510.59 MS (ESI−),m/z: 509(M − H)⁻ HPLC (method19):R_(t) = 3.99 min 162A

509.61 MS (ESI−),m/z: 508(M − H)⁻ HPLC (method20):R_(t) = 3.77 min 163A

519.60 MS (ESI−),m/z: 518(M − H)⁻ HPLC (method18):R_(t) = 3.36 min 164A

489.57 MS (ESI−),m/z: 488(M − H)⁻ HPLC (method19):R_(t) = 4.19 min 165A

489.57 MS (ESI−),m/z: 488(M − H)⁻ HPLC (method20):R_(t) = 3.36 min 166A

474.56 MS (ESI−),m/z: 473(M − H)⁻ HPLC (method19):R_(t) = 2.55 min 167A

460.53 MS (ESI+),m/z: 461(M + H)⁺ HPLC (method5):R_(t) = 2.86 min 168A

517.63 MS (ESI−),m/z: 516(M − H)⁻ HPLC (method14):R_(t) = 4.42 min 169A

503.56 MS (ESI+),m/z: 504(M + H)⁺ HPLC (method14):R_(t) = 4.05 min 170A

510.59 MS (ESI+),m/z: 511(M + H)⁺ HPLC (method21):R_(t) = 2.50 min

In accordance with general instructions E it is possible to obtain the following compounds (Example 171A to 188A) in the form of their hydrochlorides:

Example Structure MW MS HPLC 171A

417.47 MS (ESI−),m/z: 416(M − H)⁻ HPLC (method5): R_(t) = 2.23min 172A

404.43 173A

465.55 MS (ESI−),m/z: 464(M − H)⁻ HPLC (method17):R_(t) = 2.63 min 174A

389.46 MS (ESI+),m/z: 390(M + H)⁺ HPLC (method17):R_(t) = 2.14 and2.25 min 175A

417.47 176A

385.47 MS (ESI−),m/z: 384(M − H)⁻ HPLC (method20):R_(t) = 1.90 min 177A

387.48 178A

373.46 MS (ESI−),m/z: 372(M − H)⁻ HPLC (method12):R_(t) = 1.33 min 179A

410.48 HPLC (method9):R_(t) = 2.79 min 180A

409.49 MS (ESI−),m/z: 408(M − H)⁻ HPLC (method20):R_(t) = 2.14 +2.23 min 181A

419.48 HPLC (method9):R_(t) = 2.80 min 182A

389.46 MS (ESI−),m/z: 388(M − H)⁻ HPLC (method19):R_(t) = 3.17 min 183A

389.46 HPLC (method9):R_(t) = 2.86 min 184A

374.44 185A

360.42 MS (ESI+),m/z: 361(M + H)⁺ 186A

417.51 MS (ESI−),m/z: 416(M − H)⁻ HPLC (method9):R_(t) = 2.97 min 187A

403.44 MS (ESI−),m/z: 402(M − H)⁻ HPLC (method14):R_(t) = 2.40 min 188A

410.48

Preparation Examples

General Instructions K: Acylation of acylalkylamino substituted 3-[2-amino-alkanoyl]-2,5-pyrrolidinedione hydrochloride derivatives with carboxylic acid derivatives

A mixture of amine hydrochloride (1.0 eq.), carboxylic acid (1.2 to 1.3 eq.) and HATU (1.2-1.4 eq.) in solution in absolute N,N-dimethylformamide or in a 1:1 mixture of N,N-dimethylformamide and dichloromethane (0.02-0.2 mol/l) is admixed at 0° C. with a 0.2-1.0 molar solution of diisopropylethylamine (2.5 to 3.5 eq.) in N,N-dimethylformamide or a 1:1 mixture of N,N-dimethylformamide and dichloromethane over a period of 1 h. When the addition is over the reaction mixture is stirred at 0° C. for another 30 minutes and at room temperature overnight, and then is concentrated under reduced pressure. The product can be obtained by chromatography on silica gel (mobile phases: mixtures of cyclohexane/ethyl acetate or mixtures of dichloromethane and ethanol) or by RP-HPLC (mobile phases: variable gradients of water and acetonitrile), or alternatively by a combination of both methods.

Alternatively the reaction may also take place in accordance with the following method:

A mixture of amine hydrochloride (1.0 eq.), carboxylic acid (1.2 to 1.3 eq.), triethylamine (2.4-3 eq.) and HOBt (2.4-3 eq.) in absolute dichloromethane or in a mixture of N,N-dimethylformamide and dichloromethane (0.02-0.2 mol/l) is admixed finally with 1.2 eq. of EDC. The reaction mixture is stirred at room temperature (2 h to overnight) before being concentrated under reduced pressure. The residue is taken up in ethyl acetate or dichloromethane and the organic phase is washed with water, saturated sodium hydrogencarbonate solution and saturated sodium chloride solution, dried over sodium sulfate, filtered and concentrated. The product can be purified by chromatography on silica gel (mobile phases: mixtures of cyclohexane/ethyl acetate or mixtures of dichloromethane and ethanol) or by RP-HPLC (mobile phases: variable gradients of water and acetonitrile), or alternatively by a combination of both methods.

General Instructions L: Solid-phase-supported Synthesis

The aldehyde resin (Nova Biochem) (0.78 mmol/g) is suspended in toluene/trimethyl orthoformate (1:1 to 4:1), admixed with the corresponding beta-amino acid methyl ester (2.5-3 eq) at room temperature and shaken overnight. The resin is washed twice with N,N-dimethylformamide, suspended in N,N-dimethylformamide and admixed with tetrabutylammonium borohydride (2-5 eq) at room temperature. After 30 minutes of shaking at room temperature the reaction mixture is slowly admixed with glacial acetic acid (100 eq) at from −40° C. to room temperature, optionally warmed to room temperature again and shaken for at least 1 h. The resin is washed repeatedly with water, methanol, dichlormethane/10% N,N-diisopropylethylamine, methanol, dichloromethane and diethyl ether and dried. The resin is suspended in dichloromethane and shaken with N,N-diisopropylethylamine (10-20 eq) and with the corresponding carbonyl chloride (5 eq) at room temperature for 1-2 h. The resin is washed repeatedly with methanol, N,N-dimethylformamide, methanol, dichloromethane and diethyl ether and dried. For hydrolysis the resin is admixed with a solution of potassium hydroxide (30 eq) in methanol/dioxane (1:2, 30 mg potassium hydroxide/ml solution) and shaken at RT for 3 h. Subsequently the resin is washed with water, methanol, dichloromethane/glacial acetic acid, dichloromethane, dichloromethane/N,N-diisopropylethylamine, methanol, N,N-dimethylformamide, methanol, dichloromethane and diethyl ether. The resin is shaken with (benzotriazol-1-yloxy)bisdimethylaminomethylium fluoroborate (5 eq) and N,N-diisopropyl-ethylamine (20 eq) in N,N-dimethylacetamide at RT for 1 h, washed twice with N,N-dimethylacetamide, admixed with a freshly prepared solution of (3R,4S)-3-[(2S)-2-amino-3-methylbutanoyl]-4-methyl-2,5-pyrrolidinedione hydrochloride (1.5-2 eq) and N,N-diisopropylethylamine (20 eq) and shaken at RT for 3 h. Finally the resin is washed repeatedly with methanol, N,N-dimethylformamide, water, N,N-dimethylformamide, methanol, dichloromethane and diethyl ether and dried. The residue is shaken with trifluoroacetic acid or 50% strength trifluoroacetic acid in dichloromethane at from RT to 50° C. for from 30 minutes to 3 h. The crude product solution is filtered, evaporated to dryness and purifed by reversed phase HPLC using a water/acetonitrile gradient. An alternative possibility is chromatography on silica gel (mobile phases: mixtures of dichloromethane and methanol).

In accordance with the above-described instructions for the acylation of 3-[2-amino-alkanoyl]-2,5-pyrrolidinedione hydrochloride derivatives (general instructions D) or of acylalkylamino-substituted 3-[2-aminoalkanoyl]-2,5-pyrrolidinedione hydrochloride derivatives (general instructions K) with carboxylic acid derivatives or the solid-phase-supported synthesis (general instructions L) it is possible to obtain the following compounds.

Example 1 (2E)-3-(1,3-Benzodioxol-5-yl)-N-{(1S)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxo-1-phenylpropyl}-2-propenamide

¹H-NMR (400 MHz, d₆-DMSO): δ=11.34 (s, 1H), 8.44 (d, 1H), 8.12 (d, 1H), 7.46-7.38 (m, 5H), 7.35-7.29 (m, 1H), 7.13 (s, 1H), 7.05 (d, 1H), 6.92 (d, 1H), 6.50 (d, 1H), 6.07 (s, 2H), 5.47-5.30 (m, 1H), 4.61 (dd, 1H), 3.91 (d, 1 H, 2.95-2.90 (m, 1H), 2.80 (dd, 1H), 2.69 (dd, 1H), 2.32-2.25 (m, 1H), 1.08 (d, 3H), 0.79 (d, 3H), 0.74 (d, 3H). MS (ESI+): m/z (%)=534 (M+H⁺) (100). HPLC (method 4): R_(t)=2.34 min.

Example 2 (2E)-3-(1,3-Benzodioxol-5-yl)-N-{(1S)-3-[((1S)-2,2-dimethyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxo-1-phenylpropyl}-2-propenamide

¹H-NMR (200 MHz, d₆-DMSO): δ=11.40 (s, 1H), 8.46 (d, 1H), 8.19 (d, 1H), 7.35-6.90 (m, 9H), 6.50 (d, 1H), 6.07 (s, 2H), 5.37-5.25 (m, 1H), 4.39 (br.d, 1H), 3.85-3.75 (m, 1H), 2.90-2.63 (m, 3H), 1.09 (d, 3H), 0.92 (s, 9H). MS (ESI+): m/z (%)=548 (M+H⁺) (100). HPLC (method 8): R_(t)=2.45 min.

Example 3 (2E)-3-(1,3-Benzodioxol-5-yl)-N-{(1S)-3-[((1S)-1-{[(3R,4S)-1,4-dimethyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}-2-methylpropyl)amino]-3-oxo-1-phenylpropyl}-2-propenamide

¹H-NMR (400 MHz, d₆-DMSO): δ=8.45 (d, 1H), 8.16 (d, 1H), 7.36-7.25 (m, 5H), 7.22-7.18 (m, 1H), 7.12 (s, 1H), 7.03 (d, 1H), 6.94 (d, 1H), 6.50 (d, 1H), 6.06 (s, 2H), 5.38-5.28 (m, 1H), 4.66 (dd, 1H), 3.88 (d, 1H), 3.00-2.92 (m, 1H), 2.82 (s, 3H) 2.78-2.65 (m, 2H), 2.33-2.27 (m, 1H), 1.10 (d, 3H), 0.80 (d, 3H), 0.76 (d, 3H). MS (ESI+): m/z (%)=548 (M+H⁺) (100). HPLC (method 5): R_(t)=2.34 min.

Example 4 (2E)-3-(1,1′-Biphenyl-4-yl)-N-{(1S)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxo-1-phenylpropyl}-2-propenamide

¹H-NMR (400 MHz, d₆-DMSO): δ=11.33 (s, 1H), 8.54 (d, 1H), 8.13 (d, 1H), 7.76-7.61 (m, 7H), 7.50-7.21 (m, 8H), 6.70 (s, 2H), 5.40-5.30 (m, 1H), 4.63 (dd, 1H), 3.92 (d, 1H), 2.95-2.89 (m, 1H), 2.82 (dd, 1H), 2.70 (dd, 1H), 2.32-2.28 (m, 1H), 1.09 (d, 3H), 0.80 (d, 3H), 0.75 (d, 3H). MS (ESI+): m/z (%)=566 (M+H⁺) (100). HPLC (method 4): R_(t)=2.68 min.

Example 5 (2E)-3-(1,3-Benzodioxol-5-yl)-N-{1-(2,3-dihydro-1,4-benzodioxin-6-yl)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxopropyl}-2-propenamide

¹H-NMR (2 diastereoisomers, 400 MHz, CDCl₃): δ=8.41 (br. s, 1H), 8.01 (br. d, 1H), 7.56-7.48 (m, 1H), 7.01-6.96 (m, 2H), 6.85-6.75 (m, 3H), 6.34 (d, 0.5H), 6.28 (d, 0.5H), 6.00 (s, 1H), 5.99 (s, 1H), 5.61-5-59 (m, 1H), 5.50-5.46 (m, 1H), 4.81 (dd, 0.5H); 4.70 (dd, 0.5H), 4.20-4.16 (m, 4H), 3.98-3.93 (m, 1.5H), 3.48-3.33 (m, 0.5H), 3.30-3.29 (m, 0.5H), 2.94-2.88 (m, 1.5H), 2.49-2.35 (m, 1H), 1.24 (d, 1.5H), 1.17 (d, 1.5H), 0.93 (d, 1.5H), 0.82 (d, 1.5H), 0.75 (d, 1.5H), 0.69 (d, 1.5H). MS (ESI+): m/z=592 (M+H⁺).

Example 6 (2E)-N-{1-(2,3-Dihydro-1,4-benzodioxin-6-yl)-3-[((1S)-2-methyl-1-{[(3R,4S)-4-methyl-2,5-dioxo-3-pyrrolidinyl]carbonyl}propyl)amino]-3-oxopropyl}-3-phenyl-2-propenamide

MS (ESI+): m/z (%)=548 (M+H⁺) (100). HPLC (method 9): R_(t)=4.00 min.

Example Structure MW MS HPLC 7

479.53 MS (ES+), m/z(%): 480(M + H)⁺ (100) HPLC(method 6):Rt = 2.41 min 8

490.56 MS (ES+), m/z(%): 491(M + H)⁺ (100) HPLC(method 6):Rt = 2.83 min 9

490.56 MS (ES+), m/z(%): 491(M + H)⁺ (100) HPLC(method 6):Rt = 2.59 min 10

490.56 MS (ES+), m/z(%): 491(M + H)⁺ (100) HPLC(method 6):Rt = 3.12 min 11

495.60 MS (ES+), m/z(%): 496(M + H)⁺ (100) HPLC(method 6):Rt = 3.74 min 12

479.53 MS (ES+), m/z(%): 480(M + H)⁺ (100) HPLC(method 6):Rt = 3.62 min 13

479.53 MS (ES+), m/z(%): 480(M + H)⁺ (100) HPLC(method 6):Rt = 3.59 min 14

489.57 MS (ES+), m/z(%): 490(M + H)⁺ (100) HPLC(method 6):Rt = 3.83 min 15

503.60 MS (ES+), m/z(%): 504(M + H)⁺ (100) HPLC(method 6):Rt = 4.00 min 16

507.56 MS (ES+), m/z(%): 508(M + H)⁺ (100) HPLC(method 6):Rt = 3.88 min 17

507.56 MS (ES+), m/z(%): 508(M + H)⁺ (100) HPLC(method 6):Rt = 3.88 min 18

519.59 MS (ES+), m/z(%): 520(M + H)⁺ (100) HPLC(method 6):Rt = 3.86 min 19

519.59 MS (ES+), m/z(%): 520(M + H)⁺ (100) HPLC(method 6):Rt = 3.81 min 20

524.01 MS (ES+), m/z(%): 524(M + H)⁺ (100) HPLC(method 6):Rt = 4.07 min 21

524.01 MS (ES+), m/z(%): 524(M + H)⁺ (100) HPLC(method 6):Rt = 4.06 min 22

524.01 MS (ES+), m/z(%): 524(M + H)⁺ (100) HPLC(method 6):Rt = 4.00 min 23

549.62 MS (ES+), m/z(%): 550(M + H)⁺ (100) HPLC(method 6):Rt = 3.81 min 24

549.62 MS (ES+), m/z(%): 550(M + H)⁺ (100) HPLC(method 6):Rt = 3.64 min 25

549.62 MS (ES+), m/z(%): 550(M + H)⁺ (100) HPLC(method 6):Rt = 3.90 min 26

557.57 MS (ES+), m/z(%): 558(M + H)⁺ (100) HPLC(method 6):Rt = 4.17 min 27

558.46 MS (ES+), m/z(%): 558(M + H)⁺ (100) HPLC(method 6):Rt = 4.29 min 28

515.61 MS (ES+), m/z(%): 516(M + H)⁺ (100) HPLC(method 6):Rt = 4.11 min 29

519.55 MS (ES+), m/z(%): 520(M + H)⁺ (100) HPLC(method 5):Rt = 3.63 min 30

547.60 MS (ES+), m/z(%): 548(M + H)⁺ (100) HPLC(method 5):Rt = 3.98 min

Example 31 (2E)-3-(2H-Benzo[d]1,3-dioxolan-5-yl)-N-((1S)-2-{N-[(1S)-2-((4S,3R)-4-methyl-2,5-dioxoazolin-3-yl)-1-cyclopentyl-2-oxoethyl]carbamoyl}-1-phenylethyl)prop-2-enamide

¹H-NMR (400 MHz, d₆-DMSO): δ=11.33 (s, 1H), 8.49 (br. s, 1H), 8.40 (br. d, 1H), 7.37-7.18 (m, 6H), 7.12 (s, 1H), 7.04 (d, 1H), 6.93 (d, 1H), 6.51 (d, 1H), 6.06 (s, 2H), 5.48-5.27 (m, 1H), 4.52 (t, 1H), 3.89 (m, 1H), 2.91-2.78 (m, 2H), 2.69-2.60 (m, 1H), 2.48-2.27 (m, 1H), 1.60-1.32 (m, 6H), 1.26-1.03 (m, 3H), 1.05 (d, 2H). MS (ESI+): m/z=560 (M+H⁺). HPLC (method 22): R_(t)=4.15 min.

Example 32 (2E)-N-((1S)-2-{N-[(1S)-2-((4S,3R)-4-methyl-2,5-dioxoazolidin-3-yl)-1-cyclopentyl-2-oxoethyl]carbamoyl}-1-phenylethyl)-3-(2,2-difluorobenzo[3,4-d]1,3-dioxolen-5-yl)prop-2-enamide

¹H-NMR (200 MHz, d₆-DMSO): δ=11.34 (s, 1H), 8.57 (br. s, 1H), 8.29 (br. d, 1H), 7.63 (s, 1H), 7.50-7.12 (m, 7H), 6.67 (br. d, 1H), 5.43-5.24 (m, 1H), 4.63-4.41 (m, 1H), 4.40-4.20 (m, 1H), 3.88 (d, 1H), 2.97-2.57 (m, 3H), 2.41-2.12 (m, 1H), 1.54-1.28 (m, 6H), 1.28-0.97 (m, 5H). MS (ESI+): m/z=596.3 (M+H⁺). HPLC (method 19): R_(t)=4.24 min.

Example 33 (2E)-N-((1S)-2-{N-[(1S)-2-((4S,3R)-4-methyl-2,5-dioxoazolidin-3-yl)-1-cyclopentyl-2-oxoethyl]carbamoyl}-1-phenylethyl)-3-(4-cyanophenyl)prop-2-enamide

¹H-NMR (300 MHz, d₆-DMSO): δ=11.31 (s, 1H), 8.70-8.56 (m, 1H), 8.27 (d, 1H), 7.87 (d, 2H), 7.72 (d, 2H), 7.50-7.16 (m, 6H), 6.80 (d, 1H), 5.34 (dd, 1H), 4.57-4.22 (m, 1H), 3.87 (m, 1H), 2.93-2.61 (m, 3H), 2.46-2.17 (m, 2H), 1.61-1.29 (m, 6H), 1.28-0.96 (m, 4H). MS (ESI+): m/z=541 (M+H⁺). HPLC (method 19): R_(t)=4.10 min.

Example 34 (2E)-N-((1S)-2-{N-[(1S)-2-((4S,3R)-1-amino-4-methyl-2,5-dioxoazolidin-3-yl)-1-cyclopentyl-2-oxoethyl]carbamoyl}-1-phenylethyl)-3-(4-cyanophenyl)prop-2-enamide

¹NMR (300 MHz, d₆-DMSO): δ=8.72-8.57 (m, 1H), 8.54-8.23 (m, 1H), 7.88 (d, 2H), 7.72 (d, 2-H), 7.45 (d, 1H), 7.39-7.16 (m, 5H), 6.81 (d, 1H), 5.43-5.27 (m, 1H), 4.53-4.31 (m, 1H), 3.71 (d, 1H), 2.94-2.63 (m, 3H), 2.42-2.23 (m, 2H), 2.04-1.93 (m, 1H), 1.67-1.32 (m, 6H), 1.21-1.02 (m, 5H). MS (ESI+): m/z=556 (M+H⁺). HPLC (method 19): R_(t)=4.08 min.

Ex- ample Structure MW MS HPLC 35

539.61 MS (ESI+),m/z: 540(M + H)⁺ HPLC (method9): R_(t) = 3.97min 36

495.60 MS (ESI+),m/z: 496(M + H)⁺ HPLC (method9): R_(t) = 4.04min 37

490.56 MS (ESI+),m/z: 491(M + H)⁺ HPLC (method5): R_(t) = 2.74and 2.78 min 38

566.66 MS (ESI+),m/z: 567(M + H)⁺ HPLC (method5): R_(t) = 3.37min 39

623.70 MS (ESI+),m/z: 624(M + H)⁺ HPLC (method5): R_(t) = 4.30min 40

579.69 MS (ESI+),m/z: 580(M + H)⁺ HPLC (method9): R_(t) = 4.60min 41

503.60 MS (ESI+),m/z: 504(M + H)⁺ HPLC (method9): R_(t) = 4.19min 42

555.63 MS (ESI+),m/z: 556(M + H)⁺ HPLC (method9): R_(t) = 4.40min 43

623.70 MS (ESI+),m/z: 624(M + H)⁺ HPLC (method9): R_(t) = 4.45min 44

621.77 MS (ESI+),m/z: 622(M + H)⁺ HPLC (method5): R_(t) = 5.01min 45

642.75 MS (ESI+),m/z: 643(M + H)⁺ HPLC (method5): R_(t) = 4.21min 46

634.56 MS (ESI+),m/z: 634(M + H)⁺ HPLC (method5): R_(t) = 4.79min 47

580.12 MS (ESI+),m/z: 580(M + H)⁺ HPLC (method5): R_(t) = 4.77min 48

600.11 MS (ESI+),m/z: 600(M + H)⁺ HPLC (method5): R_(t) = 4.65min 49

601.10 MS (ESI+),m/z: 601(M + H)⁺ HPLC (method14): R_(t) = 4.13min 50

547.61 MS (ESI+),m/z: 548(M + H)⁺ HPLC (method12):R_(t) = 2.92 min 51

591.66 MS (ESI+),m/z: 592(M + H)⁺ HPLC (method14): R_(t) = 4.39min 52

577.59 MS (ESI+),m/z: 578(M + H)⁺ HPLC (method10): R_(t) = 2.88min 53

591.61 MS (ESI+),m/z: 592(M + H)⁺ HPLC (method14): R_(t) = 4.25min 54

547.61 MS (ESI+),m/z: 548(M + H)⁺ HPLC (method6): R_(t) = 3.84min 55

547.61 MS (ESI+),m/z: 570(M + Na)⁺ HPLC (method13):R_(t) = 4.13 min 56

547.61 MS (ESI+),m/z: 548(M + H)⁺ HPLC (method12):R_(t) = 2.99 min 57

610.66 MS (ESI+),m/z: 611(M + H)⁺ HPLC (method12):R_(t) = 2.45 min 58

639.70 MS (ESI+),m/z: 640(M + H)⁺ HPLC (method12):R_(t) = 3.50 min 59

568.02 MS (ESI+),m/z: 568(M + H)⁺ HPLC (method16):R_(t) = 2.99 min 60

578.58 MS (ESI+),m/z: 579(M + H)⁺ HPLC (method9): R_(t) = 4.06min 61

569.56 MS (ESI+),m/z: 570(M + H)⁺ HPLC (method14):R_(t) = 4.47 min 62

531.56 MS (ESI+),m/z: 532(M + H)⁺ HPLC (method16):R_(t) = 2.65 min 63

575.66 MS (ESI+),m/z: 576(M + H)⁺ HPLC (method16):R_(t) = 3.29 min 64

561.63 MS (ESI+),m/z: 562(M + H)⁺ HPLC (method16):R_(t) = 3.06 min 65

573.64 MS (ESI+),m/z: 574(M + H)⁺ HPLC (method17):R_(t) = 3.72 min 66

591.61 MS (ESI+),m/z: 592(M + H)⁺ HPLC (method14): R_(t) = 4.33min 67

623.70 MS (ESI+),m/z: 624(M + H)⁺ HPLC (method17): R_(t) = 3.92min 68

601.58 MS (ESI+),m/z: 602(M + H)⁺ HPLC (method17):R_(t) = 3.68 min 69

507.56 MS (ESI+),m/z: 508(M + H)⁺ HPLC (method17):R_(t) = 3.64 min 70

552.07 MS (ESI+),m/z: 552(M + H)⁺ HPLC (method18):R_(t) = 3.84 min 71

517.62 MS (ESI+),m/z: 518(M + H)⁺ HPLC (method18):R_(t) = 3.74 min 72

553.60 MS (ESI+),m/z: 554(M + H)⁺ HPLC (method18):R_(t) = 3.83 min 73

547.65 MS (ESI+),m/z: 548(M + H)⁺ HPLC (method18):R_(t) = 3.75 min 74

577.61 MS (ESI+),m/z: 578(M + H)⁺ HPLC (method18):R_(t) = 3.45 min 75

601.70 MS (ESI+),m/z: 602(M + H)⁺ HPLC (method18):R_(t) = 3.62 min 76

532.64 MS (ESI+),m/z: 533(M + H)⁺ HPLC (method17):R_(t) = 3.45 min 77

503.60 MS (ESI+),m/z: 504(M + H)⁺ HPLC (method17):R_(t) = 3.57 min 78

636.70 MS (ESI+),m/z: 637(M + H)⁺ HPLC (method17):R_(t) = 3.27 min 79

579.62 MS (ESI+),m/z: 580(M + H)⁺ HPLC (method17):R_(t) = 3.72 min 80

603.72 MS (ESI+),m/z: 604(M + H)⁺ HPLC (method17):R_(t) = 4.09 min 81

533.60 MS (ESI+),m/z: 534(M + H)⁺ HPLC (method22):R_(t) = 4.10 min 82

550.05 MS (ESI+),m/z: 550(M + H)⁺ HPLC (method19): R_(t) = 4.22min 83

549.58 MS (ESI+),m/z: 550(M + H)⁺ HPLC (method19):R_(t) = 4.02 min 84

583.64 MS (ESI+),m/z: 584(M + H)⁺ HPLC (method18):R_(t) = 3.70 min 85

571.63 MS (ESI+),m/z: 572(M + H)⁺ HPLC (method20):R_(t) = 3.59 min 86

638.72 MS (ESI+),m/z: 639(M + H)⁺ HPLC (method20):R_(t) = 3.39 min 87

576.65 MS (ESI+),m/z: 577(M + H)⁺ HPLC (method20):R_(t) = 3.60 min 88

564.08 MS (ESI+),m/z: 564(M + H)⁺ HPLC (method18):R_(t) = 3.90 min 89

577.63 MS (ESI+),m/z: 578(M + H)⁺ HPLC (method20):R_(t) = 3.73 min 90

548.59 MS (ESI+),m/z: 549(M + H)⁺ HPLC (method21):R_(t) = 2.96 min 91

545.59 MS (ESI+),m/z: 546(M + H)⁺ HPLC (method20): R_(t) = 3.37min 92

583.64 MS (ESI+),m/z: 584(M + H)⁺ HPLC (method19):R_(t) = 4.25 min 93

557.65 MS (ESI+),m/z: 558(M + H)⁺ HPLC (method19): R_(t) = 4.08min 94

526.59 MS (ESI+),m/z: 527(M + H)⁺ HPLC (method20): R_(t) = 3.48min 95

563.60 MS (ESI+),m/z: 564(M + H)⁺ HPLC (method20):R_(t) = 3.46 min 96

593.63 MS (ESI+),m/z: 594(M + H)⁺ HPLC (method20):R_(t) = 3.16 min 97

660.77 MS (ESI+),m/z: 661(M + H)⁺ HPLC (method21):R_(t) = 3.10 min 98

561.63 MS (ESI+),m/z: 562(M + H)⁺ HPLC (method19):R_(t) = 4.19 min 99

562.62 MS (ESI+),m/z: 563(M + H)⁺ HPLC (method19):R_(t) = 4.14 min 100

514.58 MS (ESI+),m/z: 515(M + H)⁺ HPLC (method19): R_(t) = 4.00min 101

543.62 MS (ESI+),m/z: 544(M + H)⁺ HPLC (method21):R_(t) = 3.09 min 102

539.63 MS (ESI+),m/z: 540(M + H)⁺ HPLC (method19): R_(t) = 4.12min 103

529.59 MS (ESI+),m/z: 530(M + H)⁺ HPLC (method18):R_(t) = 3.17 min 104

514.58 MS (ESI+),m/z: 515(M + H)⁺ HPLC (method18): R_(t) = 3.30min 105

575.66 MS (ESI+),m/z: 576(M + H)⁺ HPLC (method21):R_(t) = 3.52 min 106

633.75 MS (ESI+),m/z: 634(M + H)⁺ HPLC (method20):R_(t) = 3.33 min 107

583.69 MS (ESI+),m/z: 584(M + H)⁺ HPLC (method18): R_(t) = 3.58min 108

569.66 MS (ESI+),m/z: 570(M + H)⁺ HPLC (method19): R_(t) = 2.76min 109

540.62 MS (ESI+),m/z: 541(M + H)⁺ HPLC (method20): R_(t) = 3.19min 110

561.63 MS (ESI+),m/z: 562(M + H)⁺ HPLC (method18):R_(t) = 3.58 min 111

491.55 MS (ESI+),m/z: 492(M + H)⁺ HPLC (method20): R_(t) = 2.68min 112

514.58 MS (ESI+),m/z: 515(M + H)⁺ HPLC (method20): R_(t) = 3.25min 113

546.62 MS (ESI+),m/z: 547(M + H)⁺ HPLC (method20): R_(t) = 2.86min 114

563.60 MS (ESI+),m/z: 564(M + H)⁺ HPLC (method20):R_(t) = 3.28 min 115

605.69 MS (ESI+),m/z: 606(M + H)⁺ HPLC (method19):R_(t) = 2.85 min 116

521.62 MS (ESI+),m/z: 522(M + H)⁺ HPLC (method20): R_(t) = 2.59min 117

584.63 MS (ESI+),m/z: 585(M + H)⁺ HPLC (method21):R_(t) = 2.81 min 118

565.63 MS (ESI+),m/z: 566(M + H)⁺ HPLC (method19):R_(t) = 2.29 min 119

532.59 MS (ESI+),m/z: 533(M + H)⁺ HPLC (method21): R_(t) = 2.58min 120

565.63 MS (ESI+),m/z: 566(M + H)⁺ HPLC (method19): R_(t) = 2.12min

Example 121 4-(1-((2E)-3-(2H-Benzo[3,4-d]1,3-dioxolen-5-yl)prop-2-enoylamino)-2-{N-[(1S)-2-((4S,3R)-4-methyl-2,5-dioxoazolidin-3-yl)-1-(methylethyl)-2-oxoethyl]carbamoyl}-ethyl)benzoic acid

The benzoic acid methyl ester of Example 53 (240 mg, 0.41 mmol) is dissolved in 10 ml of a dioxane/water (1/1) mixture and the solution is admixed with 50 mg (0.89 mol) of potassium hydroxide. After 2 h at room temperature a further 25 mg of potassium hydroxide are added and stirring is continued for 3 h more. The reaction mixture is concentrated and the residue is taken up in water and acidified with 1 N hydrochloric acid. The product is obtained in crystalline form and is isolated by filtration. This gives 96 mg of product.

MS (ESI+): m/z=578 (M+H⁺). HPLC (method 14): R_(t)=3.68 min.

General Instructions M: Preparation of benzoic esters

The benzoic acid derivative of Example 121 is dissolved in dichloromethane and the solution is admixed with 2 to 3 eq. of the corresponding alcohol. Alternatively the alcohol can be used as solvent. 2.2 eq. of 4-dimethylaminopyridine and 1.1 eq. of EDC are added to the solution. The reaction mixture is stirred at room temperature overnight and concentrated. The product can then be crystallized from the residue by treatment with dichloromethane and diethyl ether. The product is purified further by chromatography on silica gel using dichloromethane/methanol mixtures.

In accordance with general instructions M it is possible to obtain the following compounds (Example 122 and 123):

Example Structure MW MS HPLC 122

667.71 MS (ESI+),m/z: 668(M + H)⁺ HPLC (method14): R_(t) = 4.52min 123

605.64 MS (ESI+),m/z: 606(M + H)⁺ HPLC (method14): R_(t) = 4.22min General Instructions N: Acylation of N-aminopyrrolidinedione derivatives

The N-aminopyrrolidinedione derivative is dissolved in pyridine (about 0.1 mol/l) and the solution is admixed with 1.1 eq of the corresponding carbonyl chloride. The reaction mixture is stirred at room temperature overnight and concentrated under reduced pressure. The residue is admixed with water and dichloromethane and filtered over Extrelut. The organic phase is concentrated and the crude product is purified by chromatography on silica gel using dichloromethane/ethanol mixtures.

In accordance with general instructions N it is possible to obtain the following compounds (Example 124 to 126):

Ex- ample Structure MW MS HPLC 124

590.63 MS(ESI+),m/z: 591(M + H)⁺ HPLC (method19):R_(t) = 2.59 min 125

652.70 MS(ESI+),m/z: 653(M + H)⁺ HPLC (method21):R_(t) = 3.30 min 126

666.73 MS(ESI+),m/z: 667(M + H)⁺ HPLC (method19): R_(t) = 2.78min

B. EVALUATION OF PHYSIOLOGICAL ACTIVITY

The suitability of the compounds of the invention for treating bacterial diseases can be demonstrated in the following animal models:

Determination of the Minimum Inhibitory Concentration (MIC):

The MIC is determined in a liquid dilution test. Overnight cultures of the test organisms are diluted to a cell count of 10⁵ organisms per ml in Isosensitest medium (Difco, Irvine, USA) and are incubated with dilutions of the test substances (1:2 dilution stages). Exceptions are the tests with S. pneumoniae G9A, which are conducted in BHI broth (Difco) plus 20% bovine serum, and with H. influenzae, which are conducted in BHI broth (Difco) plus 20% bovine serum, 10 μg/ml hemin and 1% Isovitale (Becton Dickinson, N.J., USA).

The cultures are incubated at 37° C. for 18-24 hours; S. pneumoniae and H. influenzae in the presence of 8-10% CO₂.

Results:

The lowest concentration of each substance at which there is no longer any visible bacterial growth is defined as the MIC. The MICs in μmol/1 of some compounds of the invention against a series of test organisms are listed by way of example in the table below.

Staphylococcus Haemophilus influenzae Ex. No. aureus 133 Spain 7 1 3.9 31.3 2 7.8 31.3 5 7.8 3.9 11 7.8 62.5 31 <1 31.3 34 <1 7.8 92 <1 15.6 Systemic Infection with S. aureus 133

S. aureus 133 cells are cultured overnight in BH broth (Oxoid, N.Y., USA). The overnight culture is diluted 1:100 in fresh BH broth and spun at high speed for 3 hours. The bacteria in the logarithmic growth phase are centrifuged off and washed 2× with buffered physiological saline solution. Subsequently a photometer (Dr. Lange model LP 2W, Berlin, Germany) is used to establish a cell suspension in saline solution with an extinction of 50 units. Following a dilution step (1:15) this suspension is mixed 1:1 with a 10% mucin suspension. 0.25 ml/20 g mouse of this infection solution is administered intraperitoneally. This corresponds to a cell count of approximately 1×10 E⁶ organisms/mouse. The intraperitoneal or intravenous therapy is practiced 30 minutes following infection. Female CFW1 mice are used for the infection experiment. The survival of the animals is recorded over 6 days.

C. EXAMPLES OF PHARMACEUTICAL COMPOSITIONS

The substances of the invention can be converted into pharmaceutical formulations as follows:

Tablet:

Composition:

100 mg of the compound from Example 1, 50 mg of lactose (monohydrate), 50 mg of corn starch, 10 mg of polyvinylpyrolidone (PVP 25) (BASF, Germany) and 2 mg of magnesium stearate.

Tablet weight 212 mg. Diameter 8 mm, radius of curvature 12 mm.

Production:

The mixture of the compound of Example 1, lactose and starch is granulated with a 5% strength solution (m/m) of the PVP in water. The granules are dried and then mixed with the magnesium stearate for 5 minutes. This mixture is compressed using a conventional tablet press (see above for tablet format).

Oral Suspension:

Composition:

1000 mg of the compound from Example 1, 1000 mg of ethanol (96%), 400 mg of Rhodigel (xanthan gum) (FMC, USA) and 99 g of water.

10 ml of oral suspension correspond to a single dose of 100 mg of the compound of the invention.

Production:

The Rhodigel is suspended in ethanol and the compound of Example 1 is added to the suspension. The water is added with stirring. The mixture is stirred for about 6 h until the Rhodigel has finished swelling.

Solution for Intravenous Administration:

Composition:

100-200 mg of the compound from Example 1, 15 g of polyethylene glycol 400 and 250 g of injection-grade water.

Production:

The compound of Example 1 is dissolved together with polyethylene glycol 400 in the water, with stirring. The solution is subjected to sterile filtration (pore diameter 0.22 μm) and dispensed under aseptic conditions into heat-sterilized infusion bottles. These bottles are sealed with infusion stoppers and crimped caps. 

1. A compound of the formula

in which R¹ is hydrogen, methyl or halogen, R¹′ is hydrogen, methyl or halogen, R² hydrogen is or methyl, R³ is hydrogen, hydroxyl, amino, C₁-C₃ alkyl, C₁-C₃ alkoxy, benzyloxy, C₁-C₃ alkylamino, C₁-C₃ alkylcarbonylamino, phenylcarbonylamino or benzylcarbonylamino, R⁴ is hydrogen or C₁-C₃ alkyl, R⁵ is halogen, trifluoromethyl, trifluoromethoxy, nitro, amino, alkylamino, hydroxyl, alkyl, alkoxy, carboxyl, alkoxycarbonyl, benzyloxycarbonyl, aminocarbonyl, alkylaminocarbonyl, aryl or heteroaryl, or two substituents R⁵ together with the carbon atoms to which they are attached form a dioxolane ring fused to the A ring, which may be substituted by 0, 1 or 2 substituents R⁵⁻¹, the substituents R⁵⁻¹ being selected independently of one another from the group consisting of halogen, nitro, amino, trifluoromethyl, hydroxyl and alkoxy, R⁶ is alkyl, cycloalkyl or cycloalkenyl, it being possible for R⁶ to be substituted by 0, 1, 2 or 3 substituents R⁶⁻¹, the substituents R⁶⁻¹ being selected independently of one another from the group consisting of halogen, nitro, amino, trifluoromethyl, hydroxyl, alkyl and alkoxy, n is a number 0, 1, 2 or 3, it being possible for the radicals R⁵ to be identical or different when n is 2 or 3, m is a number 1, 2 or 3, A is aryl or heteroaryl, it being possible for A to be substituted by 0, 1, 2 or 3 substituents R^(A), the substituents R^(A) being selected independently of one another from the group consisting of halogen, alkyl, nitro, amino, cyano, trifluoromethyl, aryl, heteroaryl, hydroxyl, alkoxy, alkylamino, carboxyl, alkoxycarbonyl, aminocarbonyl, alkylcarbonylamino and alkylaminocarbonyl, or two substituents R^(A) together with the carbon atoms to which they are attached form a dioxolane ring fused to the A ring, which may be substituted by 0, 1 or 2 substituents R^(A-1), the substituents R^(A-1) being selected independently of one another from the group consisting of halogen, nitro, amino, trifluoromethyl, hydroxyl and alkoxy, B is aryl or heteroaryl, or a pharmaceutically acceptable salt, solvate or hydrate thereof.
 2. A compound as claimed in claim 1, characterized in that R¹ is hydrogen or methyl, R¹′ is hydrogen, methyl or fluorine, R² is hydrogen, R³ is hydrogen, amino, C₁-C₃ alkyl, C₁-C₃ alkoxy, benzyloxy, C₁-C₃ alkylamino, C₁-C₃ alkylcarbonylamino, phenylcarbonylamino or benzylcarbonylamino, R⁴ is methyl, R⁵ is fluorine, chlorine, trifluoromethyl, trifluoromethoxy, nitro, amino, alkylamino, hydroxyl, alkyl, alkoxy, alkoxycarbonyl, aminocarbonyl, phenyl or 5- to 6-membered heteroaryl, or two substituents R⁵ together with the carbon atoms to which they are attached form a dioxolane ring fused to the A ring, R⁶ is C₂-C₇ alkyl, C₃-C₇ cycloalkyl or C₅-C₇ cycloalkenyl, it being possible for R⁶ to be substituted by 0, 1 or 2 substituent R⁶⁻¹, R⁶⁻¹ being selected from the group consisting of halogen, trifluoromethyl, alkyl and methoxy, n is a number 0, 1 or 2, it being possible for the radicals R⁵ to be identical or different if n is 2, m is a number 1 or 2, A is phenyl, naphthyl or 5-, 6- or 10-membered heteroaryl, it being possible for A to be substituted by 0, 1 or 2 substituents R^(A), the substituents R^(A) being selected independently of one another from the group consisting of halogen, alkyl, amino, cyano, trifluoromethyl, aryl, heteroaryl, hydroxyl, alkoxy, alkylamino, alkoxycarbonyl and aminocarbonyl, or two substituents R^(A) together with the carbon atoms to which they are attached form a dioxolane ring fused to the A ring, which may be substituted by 0 or 1 substituents R^(A-1), the substituents R^(A-1) being selected independently of one another from the group consisting of halogen, nitro, amino, trifluoromethyl, hydroxyl and alkoxy, B is phenyl, naphthyl or 5-, 6-, 9- or 10-membered heteroaryl.
 3. A compound as claimed in one of claims 1 or 2, characterized in that it conform to formula (Ia)

in which R¹ is hydrogen, R¹′ is hydrogen, methyl or fluorine, R² is hydrogen, R³ is hydrogen, amino, methyl, methoxy, ethoxy, methylamino or dimethylamino, R⁴ is methyl, R⁵ is fluorine, chlorine, trifluoromethyl, alkoxy, methoxycarbonyl, C₁-C₄ alkyl, phenyl or pyridyl, or two substituents R⁵ together with the carbon atoms to which they are attached form a dioxolane ring fused to the A ring, R⁶ is C₃-C₆ alkyl, C₄-C₆ cycloalkyl or C₅-C₆ cycloalkenyl, n is a number 0, 1 or 2, it being possible for the radicals R⁵ to be identical or different if n is 2, m is the number 1, A is phenyl, pyridyl, imidazolyl, thienyl, furanyl, oxadiazolyl, pyrazolyl, pyrazinyl, pyridazinyl, pyrimidinyl, quinolinyl or isoquinolinyl, it being possible for A to be substituted by 0, 1 or 2 substituents R^(A), the substituents R^(A) being selected independently of one another from the group consisting of halogen, alkyl, cyano, trifluoromethyl, phenyl and alkoxy, or two substituents R^(A) together with the carbon atoms to which they are attached form a dioxolane ring fused to the A ring, B is phenyl, naphthyl, pyridyl, thienyl, furanyl, quinolinyl or isoquinolinyl.
 4. A compound as claimed in claim 3, characterized in that R¹ is hydrogen, R¹′ is hydrogen, R² is hydrogen, R³ is hydrogen, amino,methylamino or dimethylamino, R⁴ is methyl, R⁵ is fluorine, chlorine, trifluoromethyl, methoxy, C₁-C₄ alkyl, phenyl or pyridyl, or two substituents R⁵ together with the phenyl ring to which they are attached form a 1,3-benzodioxole or a 1,4-benzodioxane, R⁶ is isopropyl, tert-butyl, isobutyl, isopentyl, cyclobutyl or cyclopentyl, n is a number 0, 1 or 2, it being possible for the radicals R⁵ to be identical or different if n is 2, m is the number 1, A is phenyl, pyridyl, thienyl, quinolinyl or isoquinolinyl, it being possible for A to be substituted by 0, 1 or 2 substituents R^(A), the substituents R^(A) being selected independently of one another from the group consisting of fluorine, chlorine, C₁-C₃ alkyl, cyano, trifluoromethyl, phenyl and C₁C₃ alkoxy, or two substituents R^(A) together with the phenyl ring to which they are attached form a 1,3-benzodioxole or a 1,4-benzodioxane, B is phenyl, naphthyl, thienyl, quinolinyl or isoquinolinyl.
 5. A compound as claimed in one of claims 1 or 2, characterized in that R¹ is hydrogen.
 6. A compound as claimed in claim 1, characterized in that R¹′ is hydrogen.
 7. A compound as claimed in claim 1, characterized in that R² is hydrogen.
 8. A compound as claimed in claim 1, characterized in that R⁴ is methyl.
 9. A compound as claimed in claim 1, characterized in that m is the number
 1. 10. A compound as claimed in claim 1, characterized in that R³ is hydrogen or amino.
 11. A compound as claimed in claim 1, characterized in that n is the number zero.
 12. A compound as claimed in claim 1, characterized in that n is the number 1, B is phenyl and R⁵ is fluorine, chlorine, trifluoromethyl, alkoxy, C₁-C₄-alkyl, phenyl or pyridyl, R⁵ being positioned meta or para to the linkage site of the phenyl ring.
 13. A compound as claimed in claim 1, characterized in that R⁶ is isopropyl, tert-butyl, isobutyl, isopentyl or cyclopentyl.
 14. A compound as claimed in claim 1, characterized in that A is phenyl or pyridyl, it being possible for A to be substituted by 0, 1 or 2 substituents R^(A), the substituents R^(A) being selected independently of one another from the group consisting of fluorine, chlorine, cyano, trifluoromethyl, phenyl and methoxy.
 15. A process for preparing compounds as claimed in claim 1, characterized in that by process [A] a compound of the formula

in which R² to R⁶, B and n are as defined in claim 1, is reacted with a compound of the formula

in which R¹ and R¹′, A and m are as defined in claim 1, it being possible for these to be in activated form if desired, or by process [B] a compound of the formula

in which R³, R⁴ and R⁶ are as defined in claim 1 is reacted with a compound of the formula

in which R¹, R¹′, R², R⁵, A, B, m and n are as defined in claim 1, it being possible for these to be in activated form if desired.
 16. A pharmaceutical composition comprising at least one compound as claimed in claim 1 in combination with at least one pharmaceutically acceptable carrier or excipient.
 17. A method of treating a bacterial infection in a person or animal comprising administering to said person or animal an antibacterially effective amount of at least one compound of claim
 1. 